Develop Reference

File is not downloading and progress is not showing properly in android

I Write a code to download a file with circle progress bar. But file is not downloading into external storage and progress bar does not display any progress number. No error is shown in logcat. I don't no what is wrong in my code. Help me to solve this problem. Here is my code. I have added all the permission and activity classes in manifest file. Thanks in advance.
package com.example.skr.downloader;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.os.PowerManager;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;
import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.ByteBuffer;
public class DownloaderClass extends Activity {
EditText txturl;
int progress=0;
public ProgressDialog progressDialog;
public DownloaderClass(){
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_download);
}
public void onDownload(View v){
txturl=(EditText)findViewById(R.id.txtURL);
progressDialog=new ProgressDialog(DownloaderClass.this);
final AsyncDownloaderClass asyncDownloaderClass=new AsyncDownloaderClass();
asyncDownloaderClass.execute("http://pinnest.net/newpinnest/wp-content/uploads/2013/08/1377250577ea43d.jpg");
}
class AsyncDownloaderClass extends AsyncTask<String,Integer, String>
{
private PowerManager.WakeLock mWakeLock;
Context context;
String filename, basename;
int fileLength;
DownloaderClass downloaderClass;
public AsyncDownloaderClass(){
downloaderClass=new DownloaderClass();
context=downloaderClass;
/*PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,getClass().getName());*/
}
protected void onPreExecute(){
// super.onPreExecute();
progressDialog.setMessage("Downloading....");
progressDialog.setTitle("Please Wait...");
progressDialog.setCanceledOnTouchOutside(false);
//progressDialog.setIndeterminate(false);
progressDialog.setProgress(progress);
//progressDialog.setMax(100);
progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
new AsyncDownloaderClass().cancel(true);
}
}
);
//mWakeLock.acquire();
progressDialog.show();
}
#Override
protected String doInBackground(String... params) {
//return null;
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
Log.v("Do in background","calling.....");
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
return "Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage();
}
input = connection.getInputStream();
BufferedInputStream bufferedInputStream=new BufferedInputStream(input);
fileLength = connection.getContentLength();
filename=url.getPath();
filename=filename.substring(filename.lastIndexOf('/') + 1);
output = new FileOutputStream(Environment.getExternalStorageDirectory().getPath()+"download.jpg");
byte data[] = new byte[1024];
long total = 0;
int count=0;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
if (isCancelled()) {
input.close();
return null;
}
total += count;
// publishing the progress....
if (fileLength > 0) // only if total length is known
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
} catch (Exception e) {
return e.toString();
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
} catch (IOException ignored) {
Log.v("Error","Error");
}
if (connection != null)
connection.disconnect();
}
return null;
}
protected void onProgressUpdate(Integer... values){
progressDialog.setProgress(values[0]);
progressDialog.setMessage("Downloading... " + values[0] + "%");
}
protected void onPostExecute(String... result){
progressDialog.dismiss();
if (result != null)
Toast.makeText(context,"Download error: "+result, Toast.LENGTH_LONG).show();
else
Toast.makeText(context,"File downloaded", Toast.LENGTH_SHORT).show();
}
}
}
Manifest file
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.skr.downloader">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
<application android:allowBackup="true" android:label="#string/app_name"
android:icon="#drawable/download" android:supportsRtl="true"
android:theme="#style/AppTheme"
>
<activity android:name="com.example.skr.downloader.LauncherClass">
<intent-filter>
<action android:name="android.intent.action.MAIN"></action>
<category android:name="android.intent.category.LAUNCHER"></category>
</intent-filter>
</activity>
<activity android:name=".DownloaderClass">
<intent-filter>
<action android:name="my.android.download"></action>
<category android:name="android.intent.category.DEFAULT"></category>
</intent-filter>
</activity>
</application>
</manifest>

The signature of onPostExecute is wrong. Change
protected void onPostExecute(String... result){
to
#Override
protected void onPostExecute(String result){.
As now it is never called. And change
output = new FileOutputStream(Environment.getExternalStorageDirectory().getPath()+"download.jpg");
to
output = new FileOutputStream(Environment.getExternalStorageDirectory().getPath()+"/download.jpg");

How to getfull path from sdcard in android app?

hello i used code below and i run the project in android 3.0 tablet emulator in android application nad i get path /mnt/sdcard/ but not get fullpath.how solve it ?please help me!!And my code below
![package com.hope.project;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileFilter;
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.content.Context;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
WebView myWebView;
TextView mDisplay;
AsyncTask<Void, Void, Void> mRegisterTask;
String name;
String Message;
String deviceId;
String regId;
IntentFilter gcmFilter;
SharedPreferences sharedPref;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myWebView = (WebView) findViewById(R.id.webView1);
final JavaScriptInterface myJavaScriptInterface = new JavaScriptInterface(
this);
myWebView.addJavascriptInterface(myJavaScriptInterface,
"AndroidFunction");
WebSettings settings = myWebView.getSettings();
settings.setJavaScriptEnabled(true);
settings.setDatabaseEnabled(true);
settings.setDomStorageEnabled(true);
settings.setAllowFileAccess(true);
settings.setBuiltInZoomControls(true);
settings.setUseWideViewPort(true);
settings.setJavaScriptCanOpenWindowsAutomatically(true);
settings.setLoadWithOverviewMode(true);
myWebView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
myWebView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// handle stuff here
// e.g. view.loadUrl(url);
Log.v("log", " on ovverRide " + url);
return true;
}
public void onPageFinished(WebView view, String url) {
// dismiss the indeterminate progress dialog
Log.v("log", "onPageFinished: " + url);
myWebView.setEnabled(false);
}
});
myWebView.loadUrl("file:///android_asset/www/index.html");
/* File urlName= Environment.getExternalStorageDirectory().getAbsoluteFile();
Log.v("log_tag", "urlNameDownload "+urlName);*/
/* File file\[\] = Environment.getExternalStorageDirectory().listFiles();
for (File f : file)
{
if (f.isDirectory()) {
String uri=f.getPath().substring(f.getPath().lastIndexOf("/") + 1);
Log.v("Name", uri);
Log.v("Name", f.getPath()+ "");
Log.v("Name", f.getAbsolutePath()+ "");
}
}*/
File dir = new File("mnt/sdcard/");
File\[\] files = (new File("mnt/sdcard/")).listFiles();
// This filter only returns directories
FileFilter dirFilter = new FileFilter() {
public boolean accept(File dir) {
return dir.isDirectory();
}
};
files = dir.listFiles(dirFilter);
for (int i=0; i<files.length; i++) {
if(files\[i\].getAbsolutePath().contains("Download"))
Log.v("log_tag","directory path : " + files\[i\].getAbsolutePath().substring(files\[i\].getAbsolutePath().lastIndexOf("/") +1));
}
}
protected void onDestroy() {
super.onDestroy();
}
public class JavaScriptInterface {
Context mContext;
JavaScriptInterface(Context c) {
mContext = c;
}
public void DownloadUrl(String url) {
Log.v("log", "login main url " + url);
String file_url = url;
new DownloadFileFromURL().execute(file_url);
/*
* String url_new = "http://"+url; Intent i = new
* Intent(Intent.ACTION_VIEW); i.setData(Uri.parse(url_new));
* startActivity(i);
*/
}
}
class DownloadFileFromURL extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Bar Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
// showDialog(progress_bar_type);
}
/**
* Downloading file in background thread
* */
#Override
protected String doInBackground(String... f_url) {
int count;
Log.v("log", "login main url\[0\] " + f_url\[0\]);
try {
URL url = new URL(f_url\[0\]);
name = f_url\[0\].substring(f_url\[0\].lastIndexOf("/") + 1);
URLConnection conection = url.openConnection();
conection.connect();
// getting file length
int lenghtOfFile = conection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(),
8192);
// Output stream to write file
// OutputStream output = new
// FileOutputStream("/sdcard/downloadedfile.jpg");
OutputStream output = new FileOutputStream(
Environment.getExternalStorageDirectory() + "/Download/" + name);
// OutputStream output = new
// FileOutputStream("/sdcard/downloadedUrl.mp4");
byte data\[\] = new byte\[1024\];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
/**
* Updating progress bar
* */
protected void onProgressUpdate(String... progress) {
// setting progress percentage
// pDialog.setProgress(Integer.parseInt(progress\[0\]));
}
/**
* After completing background task Dismiss the progress dialog
* **/
#Override
protected void onPostExecute(String file_url) {
// dismiss the dialog after the file was downloaded
// dismissDialog(progress_bar_type);
// Displaying downloaded image into image view
// Reading image path from sdcard
/*
* Log.v("log","login main url\[0\] " +
* Environment.getExternalStorageDirectory().toString()); String
* videoPath = Environment.getExternalStorageDirectory() +"/"+name;
* Intent i = new Intent(MainActivity.this,
* VideoPlayActivity.class); i.putExtra("videoPath", videoPath);
* startActivity(i);
*/
Toast.makeText(MainActivity.this, "DownLoad Is Completed",
Toast.LENGTH_LONG).show();
}
}
}

Instead of hardcoding mnt/sdcard/ you should use the Environment object.
Specifically:
File dir = Environment.getExternalStorageDirectory();
Will give you a file object that is automatically pointing in the proper place for the External Storage of the device that it is running on.
Also, you've posted your entire Activity. The vast majority of it is unrelated to the problem you are having. In the future it is more likely that you'll get good help on StackOverflow if you take out a smaller section of your code that specifically relates to the problem you are having. It makes it easier for people who are answering to figure out your situation.

Open gallery in specific video, without playing it

I have a camera application that can also record video. (Im developing on samsung S3)
I want to be able to open the gallery on the last recorded video.
I use this code:
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(file.getAbsolutePath()), "video/3gpp");
startActivity(intent);
The problem with that code is that the video immediately starts, and when it ends
the gallery activity close.
I want to be able to open the video without playing it, exactly like in my samsung S3.
thanks in advance!

To open particular image we can use this .. and its worked .
so please check with your requirement. Hope this will helps you..
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaScannerConnection;
import android.media.MediaScannerConnection.MediaScannerConnectionClient;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class SDCARD123Activity extends Activity implements MediaScannerConnectionClient{
public String[] allFiles;
private String SCAN_PATH ;
private static final String FILE_TYPE="image/*";
private MediaScannerConnection conn;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
File folder = new File("/sdcard/Photo/");
allFiles = folder.list();
// uriAllFiles= new Uri[allFiles.length];
for(int i=0;i<allFiles.length;i++)
{
Log.d("all file path"+i, allFiles[i]+allFiles.length);
}
// Uri uri= Uri.fromFile(new File(Environment.getExternalStorageDirectory().toString()+"/yourfoldername/"+allFiles[0]));
SCAN_PATH=Environment.getExternalStorageDirectory().toString()+"/Photo/"+allFiles[0];
System.out.println(" SCAN_PATH " +SCAN_PATH);
Log.d("SCAN PATH", "Scan Path " + SCAN_PATH);
Button scanBtn = (Button)findViewById(R.id.scanBtn);
scanBtn.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
startScan();
}});
}
private void startScan()
{
Log.d("Connected","success"+conn);
if(conn!=null)
{
conn.disconnect();
}
conn = new MediaScannerConnection(this,this);
conn.connect();
}
#Override
public void onMediaScannerConnected() {
Log.d("onMediaScannerConnected","success"+conn);
conn.scanFile(SCAN_PATH, FILE_TYPE);
}
#Override
public void onScanCompleted(String path, Uri uri) {
try {
Log.d("onScanCompleted",uri + "success"+conn);
System.out.println("URI " + uri);
if (uri != null)
{
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(uri);
startActivity(intent);
}
} finally
{
conn.disconnect();
conn = null;
}
}
}

How to read a selected text file from sdcard on android

i am new at android development and i need your help. I was locking at topics that are similar for my development but non of then help me.
So far i create functions that gets me the files from my sdcard and shows me the list of then.
That is working
this is the code for getting the paths on sdcard:
package com.seminarskirad;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.ListActivity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
public class LoadActivity extends ListActivity{
private enum DISPLAYMODE{ ABSOLUTE, RELATIVE; }
private final DISPLAYMODE displayMode = DISPLAYMODE.ABSOLUTE;
private List<String> directoryEntries = new ArrayList<String>();
private File currentDirectory = new File("/");
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Browse(Environment.getExternalStorageDirectory());
}
private void upOneLevel(){
if(this.currentDirectory.getParent() != null)
this.Browse(this.currentDirectory.getParentFile());
}
private void Browse(final File aDirectory){
if (aDirectory.isDirectory()){
this.currentDirectory = aDirectory;
fill(aDirectory.listFiles());
}
}
private void fill(File[] files) {
this.directoryEntries.clear();
if(this.currentDirectory.getParent() != null)
this.directoryEntries.add("..");
switch(this.displayMode){
case ABSOLUTE:
for (File file : files){
this.directoryEntries.add(file.getPath());
}
break;
case RELATIVE: // On relative Mode, we have to add the current-path to the beginning
int currentPathStringLenght = this.currentDirectory.getAbsolutePath().length();
for (File file : files){
this.directoryEntries.add(file.getAbsolutePath().substring(currentPathStringLenght));
}
break;
}
ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this, R.layout.load, this.directoryEntries);
this.setListAdapter(directoryList);
}
protected void onListItemClick(ListView l, View v, int position, long id) {
int selectionRowID = position;
String selectedFileString = this.directoryEntries.get(selectionRowID);
if(selectedFileString.equals("..")){
this.upOneLevel();
}else if(selectedFileString.equals()){ /// what to write here ???
this.readFile(); ///what to write here???
} else {
File clickedFile = null;
switch(this.displayMode){
case RELATIVE:
clickedFile = new File(this.currentDirectory.getAbsolutePath()
+ this.directoryEntries.get(selectionRowID));
break;
case ABSOLUTE:
clickedFile = new File(this.directoryEntries.get(selectionRowID));
break;
}
if(clickedFile.isFile())
this.Browse(clickedFile);
}
}
private void readFile() {
// what to write here???
}
Sorry i cant put the image because i dont have reputation, but when i run it on my emulator a get something like this:
/mnt/sdcard/kuzmanic.c
/mnt/sdcard/text.txt
/mnt/sdcard/DCIM
/mnt/sdcard/LOST.DIR
So what I want to do is when i click on the text.txt or kuzmanic.c file I want to open then in the same layout file, that is my load.xml file:
This is the code for the xml file:
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textSize="18sp">
</TextView>
What i need to write in my code and do I have to write anything in the manifest???

Try this code:
package com.javasamples;
import java.io.*;
import android.app.Activity;
import android.os.Bundle;
import android.view.*;
import android.view.View.OnClickListener;
import android.widget.*;
public class FileDemo2 extends Activity {
// GUI controls
EditText txtData;
Button btnWriteSDFile;
Button btnReadSDFile;
Button btnClearScreen;
Button btnClose;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// bind GUI elements with local controls
txtData = (EditText) findViewById(R.id.txtData);
txtData.setHint("Enter some lines of data here...");
btnWriteSDFile = (Button) findViewById(R.id.btnWriteSDFile);
btnWriteSDFile.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// write on SD card file data in the text box
try {
File myFile = new File("/sdcard/mysdfile.txt");
myFile.createNewFile();
FileOutputStream fOut = new FileOutputStream(myFile);
OutputStreamWriter myOutWriter =
new OutputStreamWriter(fOut);
myOutWriter.append(txtData.getText());
myOutWriter.close();
fOut.close();
Toast.makeText(getBaseContext(),
"Done writing SD 'mysdfile.txt'",
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Toast.makeText(getBaseContext(), e.getMessage(),
Toast.LENGTH_SHORT).show();
}
}// onClick
}); // btnWriteSDFile
btnReadSDFile = (Button) findViewById(R.id.btnReadSDFile);
btnReadSDFile.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// write on SD card file data in the text box
try {
File myFile = new File("/sdcard/mysdfile.txt");
FileInputStream fIn = new FileInputStream(myFile);
BufferedReader myReader = new BufferedReader(
new InputStreamReader(fIn));
String aDataRow = "";
String aBuffer = "";
while ((aDataRow = myReader.readLine()) != null) {
aBuffer += aDataRow + "\n";
}
txtData.setText(aBuffer);
myReader.close();
Toast.makeText(getBaseContext(),
"Done reading SD 'mysdfile.txt'",
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Toast.makeText(getBaseContext(), e.getMessage(),
Toast.LENGTH_SHORT).show();
}
}// onClick
}); // btnReadSDFile
btnClearScreen = (Button) findViewById(R.id.btnClearScreen);
btnClearScreen.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// clear text box
txtData.setText("");
}
}); // btnClearScreen
btnClose = (Button) findViewById(R.id.btnClose);
btnClose.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// clear text box
finish();
}
}); // btnClose
}// onCreate
}// AndSDcard
the layout file is
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="#+id/widget28"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ff0000ff"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
>
<EditText
android:id="#+id/txtData"
android:layout_width="fill_parent"
android:layout_height="180px"
android:textSize="18sp" />
<Button
android:id="#+id/btnWriteSDFile"
android:layout_width="143px"
android:layout_height="44px"
android:text="1. Write SD File" />
<Button
android:id="#+id/btnClearScreen"
android:layout_width="141px"
android:layout_height="42px"
android:text="2. Clear Screen" />
<Button
android:id="#+id/btnReadSDFile"
android:layout_width="140px"
android:layout_height="42px"
android:text="3. Read SD File" />
<Button
android:id="#+id/btnClose"
android:layout_width="141px"
android:layout_height="43px"
android:text="4. Close" />
</LinearLayout>

I used this code to read a text file in SD card,
public class ReadFileSDCardActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Find the view by its id
TextView tv = (TextView)findViewById(R.id.fileContent);
File dir = Environment.getExternalStorageDirectory();
//File yourFile = new File(dir, "path/to/the/file/inside/the/sdcard.ext");
//Get the text file
File file = new File(dir,"text.txt");
// i have kept text.txt in the sd-card
if(file.exists()) // check if file exist
{
//Read text from file
StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
}
}
catch (IOException e) {
//You'll need to add proper error handling here
}
//Set the text
tv.setText(text);
}
else
{
tv.setText("Sorry file doesn't exist!!");
}
}
}

first you have to give an id to your textview into the load.xml file and define the textview inside a linear layout. like this
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
<TextView android:id="#+id/tv1
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textSize="18sp"/>
now you have to set the layout of your activity.you can do this in the onCreate() method only.
setContentView(R.layout.load);
now make a TextVew object like this.
TextView tview = (TextView) findViewById(R.id.tv1);
now you have to read the text file using FileInputStream and keep it into a string variable.
after that you can assign the string to the text view.
tview.setText(string variable name);

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.