Develop Reference

why is pdf from internal storage not showing in webview

I have a .pdf file (which can change content daily, so must be downloaded daily) on my server which is downloaded to the device using Volley. The api uses authentication tokens.
I can successfully call the web service and write the pdf (byte[]) to my app's internal storage by using context.getExternalFilesDir.
The problem i am having is once the pdf is saved and i contruct the path, the webView will not show the pdf. The webView is working fine as i have done a test by placing a test html in the project's raw directory. The webView can display this fine.
The following does not load the pdf.
webView.loadUrl("file://" + f2.getAbsolutePath());
f2 path on my device is
f2.getAbsolutePath() = /storage/emulated/0/Android/data/com.xxxx.rrx/files/careplans/careplan.pdf
There seems to be no error but the pdf does not load.
What i have tried:
i've tried changing the webSettings for the webView to allow file access.
WebSettings webViewSettings = webView.getSettings();
// Setting this off for security. Off by default for SDK versions >= 16.
webViewSettings.setAllowFileAccessFromFileURLs(true);
// Off by default, deprecated for SDK versions >= 30.
webViewSettings.setAllowUniversalAccessFromFileURLs(true);
// Keeping these off is less critical but still a good idea, especially if your app is not
// using file:// or content:// URLs.
webViewSettings.setAllowFileAccess(true);
webViewSettings.setAllowContentAccess(true);
Does anyone have any ideas why the webview does not show the pdf when it is stored in the app's own storage?
here is my complete class.
import android.app.DownloadManager;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Base64;
import android.util.Log;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.android.volley.VolleyError;
import org.json.JSONObject;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
public class DownloadCarePlanActivity extends AppCompatActivity {
private static final String TAG = DownloadCarePlanActivity.class.getSimpleName();
DownloadManager manager;
long reference;
String url;
Context context;
String fileName;
WebView webView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.downloadcareplan_activity);
Log.e(TAG, "inside onCreate" );
context = getApplicationContext();
webView = (WebView)findViewById(R.id.webViewCareplan);
url = "https://xxx/api/xxx/careplan/1";
WebServicesForWebApi webServices = new WebServicesForWebApi(DownloadCarePlanActivity.this, new WebServicesForWebApi.IResultForFile() {
#Override
public void notifySuccess(byte[] response, String responseString) {
//responseString = responseString.replace('\\', ' ');
Log.e(TAG, "formatted result for pdf webservice = " + response);
byte[] result;
if(response != null){
try {
byte[] bytes = response;
saveToFile(bytes, "careplan.pdf");
}catch (Exception e){
Toast.makeText(DownloadCarePlanActivity.this, "Error downloading pdf and saving it", Toast.LENGTH_LONG).show();
}
}
}
#Override
public void notifyError(VolleyError error) {
Toast.makeText(DownloadCarePlanActivity.this, "There was a problem in sendFireBaseTokenToServerWAPI", Toast.LENGTH_LONG).show();
}
});
JSONObject js = new JSONObject();
/*try {
js.put("carerId", "0");
js.put("phoneId", fireBaseToken);
} catch (JSONException e) {
e.printStackTrace();
}*/
webServices.makeWebApiPostForFile(url, js);
}//end of onCreate
public void saveToFile(byte[] byteArray, String pFileName){
//File f = new File(Environment.getExternalStorageDirectory() + "/careplans");
File f = getAbsoluteFile("/careplans", context);
Log.e(TAG, "f.path = " + f.getAbsolutePath());
if(f.isDirectory()){
f.delete();
}
if (!f.isDirectory()) {
f.mkdir();
}
//String fileName = Environment.getExternalStorageDirectory() + "/careplans/" + pFileName;
fileName = f.getAbsolutePath() + "/" + pFileName;
Log.e(TAG, "String fileName = " + fileName);
try {
FileOutputStream fPdf = new FileOutputStream(fileName);
fPdf.write(byteArray);
fPdf.flush();
fPdf.close();
Toast.makeText(this, "File successfully saved", Toast.LENGTH_LONG).show();
try {
File f2 = new File(fileName);
Log.e(TAG, "f2.getAbsolutePath() = " + f2.getAbsolutePath());
Log.e(TAG, "f2.getCanonicalPath() = " + f2.getCanonicalPath());
Log.e(TAG, "loading file in webview" );
WebSettings webViewSettings = webView.getSettings();
// Setting this off for security. Off by default for SDK versions >= 16.
webViewSettings.setAllowFileAccessFromFileURLs(true);
// Off by default, deprecated for SDK versions >= 30.
webViewSettings.setAllowUniversalAccessFromFileURLs(true);
// Keeping these off is less critical but still a good idea, especially if your app is not
// using file:// or content:// URLs.
webViewSettings.setAllowFileAccess(true);
webViewSettings.setAllowContentAccess(true);
webView.loadUrl("file://" + f2.getAbsolutePath());
//webView.loadUrl("file:///android_res/raw/index.html");
Log.e(TAG, "finished loading file in webview" );
}catch(Exception e){
final Writer result = new StringWriter();
final PrintWriter printWriter = new PrintWriter(result);
e.printStackTrace(printWriter);
String stacktrace = result.toString();
printWriter.close();
Log.e(TAG, "stack = " + stacktrace);
}
} catch (FileNotFoundException e) {
Toast.makeText(this, "File create error", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(this, "File write error", Toast.LENGTH_LONG).show();
}
}
#Override
protected void onResume() {
super.onResume();
}
#Override
protected void onPause() {
super.onPause();
}
private File getAbsoluteFile(String relativePath, Context context) {
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
return new File(context.getExternalFilesDir(null), relativePath);
} else {
return new File(context.getFilesDir(), relativePath);
}
}
}

well, WebView is designed to open web pages, PDF isn't such content type... yeah, desktop browser can do it, even some mobile ones, but this is additional feature. not available in WebView, you have to handle such file by yourself (e.g. using PdfRenderer). another way is to use some library, first example from search engine: AndroidPdfViewer on GitHub
edit: just realised that your PDF is local only, so below probably isn't an option for you...
way simpler would be to use some web application, which can read PDF and show it as a web page, readable by WebView. for example try to load below URL
String pdfUrl = "https://docs.google.com/gview?embedded=true&url=" + realPdfUrl;

Create, write and display PDF file in android app

I have an android app which is basically a form to accept user input. This input is stored in a database. But I want to create a pdf file with the information a user enters and and display it so that the user can print the file or save the file to their android note tab. What is the best way to go about it. I have seen iText around but this does not render the file. I found this code online and I tested it to understand the concept of pdf creation. This uses Lowagie 2.1.7
package com.example.sweetiean.androidpdfdemo;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.net.Uri;
import android.os.Environment;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Font;
import com.lowagie.text.HeaderFooter;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Phrase;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.Image;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class MainActivity extends ActionBarActivity {
private Button createPDF , openPDF;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
createPDF = (Button)findViewById(R.id.button1);
createPDF.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
createPDF();
}
});
openPDF = (Button)findViewById(R.id.button2);
openPDF.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
openPdf();
}
});
}
public void createPDF()
{
Document doc = new Document();
try {
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/PDF";
File dir = new File(path);
if(!dir.exists())
dir.mkdirs();
Log.d("PDFCreator", "PDF Path: " + path);
File file = new File(dir, "demo.pdf");
FileOutputStream fOut = new FileOutputStream(file);
PdfWriter.getInstance(doc, fOut);
//open the document
doc.open();
/* Create Paragraph and S`enter code here`et Font */
Paragraph p1 = new Paragraph("Hi! I am Generating my first PDF using DroidText");
/* Create Set Font and its Size */
Font paraFont= new Font(Font.HELVETICA);
paraFont.setSize(16);
p1.setAlignment(Paragraph.ALIGN_CENTER);
p1.setFont(paraFont);
//add paragraph to document
doc.add(p1);
Paragraph p2 = new Paragraph("This is an example of a simple paragraph");
/* You can also SET FONT and SIZE like this */
Font paraFont2= new Font(Font.COURIER,14.0f, Color.GREEN);
p2.setAlignment(Paragraph.ALIGN_CENTER);
p2.setFont(paraFont2);
doc.add(p2);
/* Inserting Image in PDF */
/*ByteArrayOutputStream stream = new ByteArrayOutputStream();
Bitmap bitmap = BitmapFactory.decodeResource(getBaseContext().getResources(), R.drawable.android);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100 , stream);
Image myImg = Image.getInstance(stream.toByteArray());
myImg.setAlignment(Image.MIDDLE);
//add image to document
doc.add(myImg);*/
//set footer
Phrase footerText = new Phrase("This is an example of a footer");
HeaderFooter pdfFooter = new HeaderFooter(footerText, false);
doc.setFooter(pdfFooter);
Toast.makeText(getApplicationContext(), "Created...", Toast.LENGTH_LONG).show();
} catch (DocumentException de) {
Log.e("PDFCreator", "DocumentException:" + de);
} catch (IOException e) {
Log.e("PDFCreator", "ioException:" + e);
}
finally
{
doc.close();
}
}
void openPdf()
{
Intent intent = new Intent(Intent.ACTION_VIEW);
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/PDF";
File file = new File(path, "demo.pdf");
intent.setDataAndType( Uri.fromFile(file), "application/pdf" );
startActivity(intent);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
And this is the main activity.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<Button
android:id="#+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/textView1"
android:layout_marginTop="100dp"
android:text="Open PDF" />
<Button
android:id="#+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textView1"
android:layout_marginTop="44dp"
android:text="Generate PDF" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:text="#string/hello_world" />

Do it this way:
import com.cete.dynamicpdf.*;
import com.cete.dynamicpdf.pageelements.Label;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.widget.Toast;
public class DynamicPDFHelloWorld extends Activity {
private static String FILE = Environment.getExternalStorageDirectory()
+ "/HelloWorld.pdf";
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Create a document and set it's properties
Document objDocument = new Document();
objDocument.setCreator("DynamicPDFHelloWorld.java");
objDocument.setAuthor("Your Name");
objDocument.setTitle("Hello World");
// Create a page to add to the document
Page objPage = new Page(PageSize.LETTER, PageOrientation.PORTRAIT,
54.0f);
// Create a Label to add to the page
String strText = "Hello World...\nFrom DynamicPDF Generator "
+ "for Java\nDynamicPDF.com";
Label objLabel = new Label(strText, 0, 0, 504, 100,
Font.getHelvetica(), 18, TextAlign.CENTER);
// Add label to page
objPage.getElements().add(objLabel);
// Add page to document
objDocument.getPages().add(objPage);
try {
// Outputs the document to file
objDocument.draw(FILE);
Toast.makeText(this, "File has been written to :" + FILE,
Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(this,
"Error, unable to write to file\n" + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}
Also check these links. They will help you to fulfill your requirement.
http://www.dynamicpdf.com/Blog/post/2012/06/15/Generating-PDFs-Dynamically-on-Android.aspx
https://github.com/JoanZapata/android-pdfview
How to create PDFs in an Android app?
Render a PDF file using Java on Android

you'll find the correct code that actually works right.for creating a pdf file, putting some content in it, saving in and the opening the newly created file.
For this you'll need to add the jar of iTextG to your project:
OR
if you WANT TO convert your layout or view into pdf then you have to create image from your layout and then add into pdf.Perfect tutorial of that Go Through this Link . Hope this will help you guys.Thank you.
For Simple Create and Open pdf:
// Method for creating a pdf file from text, saving it then opening it for display
public void createandDisplayPdf(String text) {
Document doc = new Document();
try {
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/PDF";
File dir = new File(path);
if(!dir.exists())
dir.mkdirs();
File file = new File(dir, "mypdffile.pdf");
FileOutputStream fOut = new FileOutputStream(file);
PdfWriter.getInstance(doc, fOut);
//open the document
doc.open();
Paragraph p1 = new Paragraph(text);
Font paraFont= new Font(Font.FontFamily.COURIER);
p1.setAlignment(Paragraph.ALIGN_CENTER);
p1.setFont(paraFont);
//add paragraph to document
doc.add(p1);
} catch (DocumentException de) {
Log.e("PDFCreator", "DocumentException:" + de);
} catch (IOException e) {
Log.e("PDFCreator", "ioException:" + e);
}
finally {
doc.close();
}
viewPdf("mypdffile.pdf", "PDF");
}
// Method for opening a pdf file
private void viewPdf(String file, String directory) {
File pdfFile = new File(Environment.getExternalStorageDirectory() + "/" + directory + "/" + file);
Uri path = Uri.fromFile(pdfFile);
// Setting the intent for pdf reader
Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
pdfIntent.setDataAndType(path, "application/pdf");
pdfIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {
startActivity(pdfIntent);
} catch (ActivityNotFoundException e) {
Toast.makeText(this, "Can't read pdf file", Toast.LENGTH_SHORT).show();
}
}

Check this link,it requires you to download a jar file.(more description in the link).Here is a part of code to generate pdf.
package com.cete.androidexamples.dynamicpdf.helloworld;
import com.cete.dynamicpdf.*;
import com.cete.dynamicpdf.pageelements.Label;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.widget.Toast;
public class DynamicPDFHelloWorld extends Activity {
private static String FILE = Environment.getExternalStorageDirectory()
+ "/HelloWorld.pdf";
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Create a document and set it's properties
Document objDocument = new Document();
objDocument.setCreator("DynamicPDFHelloWorld.java");
objDocument.setAuthor("Your Name");
objDocument.setTitle("Hello World");
// Create a page to add to the document
Page objPage = new Page(PageSize.LETTER, PageOrientation.PORTRAIT,
54.0f);
// Create a Label to add to the page
String strText = "Hello World...\nFrom DynamicPDF Generator "
+ "for Java\nDynamicPDF.com";
Label objLabel = new Label(strText, 0, 0, 504, 100,
Font.getHelvetica(), 18, TextAlign.CENTER);
// Add label to page
objPage.getElements().add(objLabel);
// Add page to document
objDocument.getPages().add(objPage);
try {
// Outputs the document to file
objDocument.draw(FILE);
Toast.makeText(this, "File has been written to :" + FILE,
Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(this,
"Error, unable to write to file\n" + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}

How create a folder on SdCard and how to copy files from one to another

In this Project i am trying to copy files from sdcard (for eg images in DICM) to Recycle Folder whenever user click delete button. But, i am facing problem. I am able to delete files but but unable to copy thing.
C.Java - Using for assigning directories.
package com.haha.recyclebin;
public class C
{
public static String SDCARD = "/mnt/sdcard";
public static String RECYCLE_BIN_ROOT = SDCARD+"/.Recycle";
}
U.Java - Using for copying file from one folder on Sdcard to Recycle Folder.
package com.haha.recyclebin;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class U
{
public static void copyFile(File sourceLocation, File targetLocation)
throws FileNotFoundException, IOException
{
U.debug("copying from "+sourceLocation.getAbsolutePath()+" to "+targetLocation.getAbsolutePath());
String destDirPath = targetLocation.getParent();
File destDir = new File(destDirPath);
if(!destDir.exists()){
destDir.mkdirs();
}
InputStream in = new FileInputStream(sourceLocation);
OutputStream out = new FileOutputStream(targetLocation);
// Copy the bits from instream to outstream
byte[] buf = new byte[1024*512];
int len;
while ((len = in.read(buf)) > 0) {
System.out.println("papa");
out.write(buf, 0, len);
System.out.println(">");
}
System.out.println(".");
in.close();
out.close();
}
public static void debug(Object msg){
System.out.println(msg);
}
}
RecycleActivity - using U.java and C.java in this code :-
package com.haha.recyclebin;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.util.Set;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Toast;
public class RecycleActivity extends Activity {
private OnClickListener exitListener = new OnClickListener()
{
#Override
public void onClick(DialogInterface paramDialogInterface, int paramInt)
{
RecycleActivity.this.finish();
}
};
/**
* need a standalone class to hold data (file name)
*/
private final class DeleteFileListener implements OnClickListener
{
String file = null;
/**
* #param file the file to set
*/
public void setFile(String file)
{
this.file = file;
}
#Override
public void onClick(DialogInterface paramDialogInterface, int paramInt)
{
RecycleActivity.this.prepareRecyclebin();
File src = new File(file);
String destPath = C.RECYCLE_BIN_ROOT+file;
File dest = new File(destPath);
try
{
U.copyFile(src, dest); /* using U.java here */
src.delete();
String msg = RecycleActivity.this.getResources().getString(R.string.deleted) + destPath;
Toast.makeText(RecycleActivity.this, msg, Toast.LENGTH_SHORT).show();
} catch (Exception e)
{
e.printStackTrace();
Toast.makeText(RecycleActivity.this, R.string.delete_failed, Toast.LENGTH_SHORT).show();
}
RecycleActivity.this.finish();
}
}
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Intent intent = getIntent();
debugIntent(intent);
Bundle extras = intent.getExtras();
/* For File Explorer */
Object obj = extras.get(Intent.EXTRA_INTENT);
if(null!=obj){
Intent it2 = (Intent) obj;
Bundle ex2 = it2.getExtras();
Object obj2 = ex2.get(Intent.EXTRA_STREAM);
if(null!=obj2){
Uri uri = (Uri) obj2;
String file = uri.getPath();
System.out.println("file: "+file);
toRecyclebin(file);
}
}
}
/**
* #param file
*/
private void toRecyclebin(String file)
{
if(!file.startsWith(C.SDCARD))
{
promptLimit();
return;
}
String conf = this.getResources().getString(R.string.confirm_delete);
conf+="\n\n"+file;
DeleteFileListener listener = new DeleteFileListener();
listener.setFile(file);
new AlertDialog.Builder(this)
.setMessage(conf)
.setPositiveButton(R.string.yes, listener)
.setNegativeButton(R.string.no, exitListener)
.show();
}
/**
*
*/
private void promptLimit()
{
new AlertDialog.Builder(this)
.setMessage(R.string.limit)
.setPositiveButton(R.string.ok, exitListener)
.show();
}
/**
* #param intent
*/
private void debugIntent(Intent intent)
{
System.out.println("intent: "+intent);
Bundle extras = intent.getExtras();
Set<String> keys = extras.keySet();
for(String key:keys){
Object value = extras.get(key);
System.out.println("-["+key+"]:["+value+"]");
if(value instanceof Intent){
Intent intent2 = (Intent) value;
Bundle ext2 = intent2.getExtras();
Set<String> ks2 = ext2.keySet();
for(String k:ks2){
Object v2 = ext2.get(k);
System.out.println("--["+k+"]:["+v2+"]");
if(v2 instanceof Intent){
Intent i3 = (Intent) v2;
Bundle e3 = i3.getExtras();
Set<String> ks3 = e3.keySet();
for(String kk:ks3){
Object v3 = e3.get(kk);
System.out.println("---["+kk+"]:["+v3+"]");
}
}
}
}
}
Uri data = intent.getData();
System.out.println("data: "+data);
}
void prepareRecyclebin(){
File root = new File(C.RECYCLE_BIN_ROOT);
if(!root.exists()){
root.mkdirs();
}
}
}
I have file explorer which is working fine, I can see images and music on sdcard and i am able to delete then also. But after deletion they should go to Recycle folder (as stated in C.java ). I have created Recycle Folder (/mnt/sdcard/Recycle) manually using file explorer in eclipse.
But i don't see files in recycle folder.
Is there any problem with the Code ?
Any kind of Help will be appreciated.
Thanks !!

Have you Debug and make sure the copyfile has been executed?
And this is My CopyFile function, and they are quite the same:
public static boolean copyFile(String from, String to) {
try {
int bytesum = 0;
int byteread = 0;
File oldfile = new File(from);
if (oldfile.exists()) {
InputStream inStream = new FileInputStream(from);
FileOutputStream fs = new FileOutputStream(to);
byte[] buffer = new byte[1444];
while ((byteread = inStream.read(buffer)) != -1) {
bytesum += byteread;
fs.write(buffer, 0, byteread);
}
inStream.close();
fs.close();
}
return true;
} catch (Exception e) {
return false;
}
}

Try following Code, it will Work.
public void Save_To_Phone(Bitmap bitmap){
try {
FileOutputStream os = new FileOutputStream(YourSDCardPath);
bitmap.compress(CompressFormat.JPEG, 80, os);
os.close();
} catch (Exception e) {
Log.w("ExternalStorage", "Error writing file", e);
}
}

exception determination how to know what to catch

I do understand the basics of try and catch in as much as you try some code and look for errors that occur and catch them and then do something based on the error. I have code that when run looks for a complete video file exists on the SD card it plays the video if it is not complete it downloads it to the SD card then I want it to play.
here is my code block
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Window;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.VideoView;
public class VideoActivity extends Activity {
private static final String TAG = "MyActivity";
public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
public static final Context ACTION_VIEW = null;
private ProgressDialog mProgressDialog;
public String url = "";
public String fName = "";
public String vidName = "";
public String path="";
//final VideoView videoView = (VideoView) findViewById(R.id.videoView1);
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
final String[] myAPP_FILES = getResources().getStringArray(R.array.APP_FILES);
final String[] myAPP_FILENAMES = getResources().getStringArray(R.array.APP_FILENAMES);
final String[] myAPP_NAMES = getResources().getStringArray(R.array.APP_NAMES);
final int[] myAPP_SIZES = getResources().getIntArray(R.array.APP_SIZES);
setContentView(R.layout.video);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
final VideoView videoView = (VideoView) findViewById(R.id.videoView1);
final MediaController mediaController = new MediaController(this);
mediaController.setAnchorView(videoView);
Bundle extras = getIntent().getExtras();
url = myAPP_FILES[extras.getInt("key") ];
fName = myAPP_FILENAMES[extras.getInt("key") ];
vidName = myAPP_NAMES[extras.getInt("key") ];
int fsize = (myAPP_SIZES[extras.getInt("key") ] -1 )*1000;
File file1 = new File(Environment.getExternalStorageDirectory(), fName );
if (file1.exists()) {
if(file1.length() < fsize) {
file1.delete();
}
}
loadMedia();
Toast.makeText(
getApplicationContext(),
"" + file1.length()+ " " + fsize,
Toast.LENGTH_LONG).show();
String pathfile = Environment.getExternalStorageDirectory() + "/" +fName;
try {
Uri video = Uri.parse(pathfile);
videoView.setMediaController(mediaController);
videoView.setVideoURI(video);
videoView.start();
} catch (Exception w) {}
}
private void loadMedia() {
//Check for media file download if not on sdcard
File file = new File(Environment.getExternalStorageDirectory(), fName );
if (!file.exists()) {
new DownloadFileAsync().execute(url);
}
}
#Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_DOWNLOAD_PROGRESS:
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Downloading to SD: " + vidName + "\n...Please allow download to finish completely...");
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setCancelable(true);
mProgressDialog.show();
return mProgressDialog;
default:
return null;
}
}
class DownloadFileAsync extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(DIALOG_DOWNLOAD_PROGRESS);
}
#Override
protected String doInBackground(String... aurl) {
int count;
try {
URL url = new URL(aurl[0]);
URLConnection conexion = url.openConnection();
conexion.connect();
int lengthOfFile = conexion.getContentLength();
Log.d("ANDRO_ASYNC", "Length of file: " + lengthOfFile);
InputStream input = new BufferedInputStream(url.openStream(), 1024);
OutputStream output = new FileOutputStream("/sdcard/" + fName);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress(""+(int)((total*100)/lengthOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {}
return null;
}
protected void onProgressUpdate(String... progress) {
Log.d("ANDRO_ASYNC",progress[0]);
mProgressDialog.setProgress(Integer.parseInt(progress[0]));
}
#Override
protected void onPostExecute(String unused) {
dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
}
}
}
In operation a spinner is displayed and the user can select a video. It then checks to see if the file exists on the SD card if it is not it starts the download and a progress bar is displayed. Here is the problem At that time a message pops up that says:
CANNOT PLAY VIDEO
Sorry, this video cannot be played.
the download is progressing in the background and I can see the progress bar but it is darkened down
I do not want this message to appear.
I want to catch this and do nothing so the message will not appear
In the code I process the loadmedia function and then I set the video to play. I need to try and catch this step looking for this error message but I do not know what to look for
in my logcat I see this
02-02 09:35:29.257: W/MediaPlayer(13311): info/warning (1, 26)
02-02 09:35:29.257: E/MediaPlayer(13311): error (1, -4)
02-02 09:35:29.277: I/MediaPlayer(13311): Info (1,26)
02-02 09:35:29.277: E/MediaPlayer(13311): Error (1,-4)
02-02 09:35:29.277: D/VideoView(13311): Error: 1,-4
I think it is included here but I don't know how to translate this into a valid try and catch routine
Hopefully someone can help

To catch an exception an exception must be thrown. Looks like you're already catching the base level Exception which would catch any uncaught exception from the media player layer. Therefore, they're not throwing any that they aren't catching themselves.
So this isn't about catching exceptions at this point but registering to receive notification of errors that the framework provides. Looking here shows a way to register a listener for errors. Whether that means that the error won't show up as you've described is unknown. I suspect it'll still show. But you may have no control over that.

How can I look at the database of my application on a non-rooted phone

I have installed my android application (with debug on) on my non-rooted Nexus phone.
My question is how can I look at the database created by my application?
Thank you.

you cannot do that but if its your own application you can actually go through the tedious way of exporting your database files to the sd card heres a utility method I came out with to help with that..
Change the string "/data/net.rejinderi.yourpackagehere/databases/yourdbnamehere.db" to fit your application, create an instance of the AsyncTask and call execute on it. that simple.
Be sure to include the permissions of using the external storage though..
Good luck. :)
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Environment;
import android.widget.Toast;
public class ExportDatabaseFileTask extends AsyncTask<Void, Void, Boolean> {
private final ProgressDialog progressDialog;
private Context context;
public ExportDatabaseFileTask(Context context)
{
this.context = context;
progressDialog = new ProgressDialog(context);
}
protected void onPreExecute() {
this.progressDialog.setMessage("Exporting database...");
this.progressDialog.show();
}
protected Boolean doInBackground(Void... args) {
File dbFile = new File(Environment.getDataDirectory() + "/data/net.rejinderi.yourpackagehere/databases/yourdbnamehere.db");
File exportDir = new File(Environment.getExternalStorageDirectory(), "");
if (!exportDir.exists()) {
exportDir.mkdirs();
}
File file = new File(exportDir, dbFile.getName());
try {
file.createNewFile();
this.copyFile(dbFile, file);
return true;
} catch (IOException e) {
return false;
}
}
protected void onPostExecute(final Boolean success) {
if (this.progressDialog.isShowing()) {
this.progressDialog.dismiss();
}
if (success) {
Toast.makeText(context, "Export successful!", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(context, "Export failed", Toast.LENGTH_SHORT).show();
}
}
void copyFile(File src, File dst) throws IOException {
FileChannel inChannel = new FileInputStream(src).getChannel();
FileChannel outChannel = new FileOutputStream(dst).getChannel();
try {
inChannel.transferTo(0, inChannel.size(), outChannel);
} finally {
if (inChannel != null)
inChannel.close();
if (outChannel != null)
outChannel.close();
}
}
}

I've looked into this and unfortunately there's no practical way to do this. This is because you can't get access to the files on a non-rooted phone.
This is why whenever I need to access the database, i just fire up the emulator since you can easily get access to the database and even make changes on the fly and see how it effects the app.

for debug purposes you can programatically copy db file(s) from internal phone memory to external (SD card). they're just a files after all