Actually i am trying to make an android app to display a text when the battery becomes 50% ,m using text view to display the msg,but while loading the app it gets unfortunately stops.
here is my code:
Java file.
package com.example.abhi.batteryalarm;
import android.content.Intent;
import android.os.BatteryManager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class Battery_Alarm extends ActionBarActivity {
Intent batteryStatus;
TextView txtView;
String hello;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_battery__alarm);
txtView=(TextView)findViewById(R.id.txtView);
hello="This is my first project";
int level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
if (level==50)
{
txtView.setText(hello);
}
}
#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_battery__alarm, 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);
}
}
activity file:
<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" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".Battery_Alarm">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="hello"
android:textSize="62sp"
android:id="#+id/txtView"
android:layout_centerHorizontal="true"
android:layout_marginBottom="125dp" />
</RelativeLayout>
What things i need to do?
Add this,
batteryStatus = registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
before,
int level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
and it will work.
This is the line which is causing the error :
int level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
It's because the batteryStatus intent is never initialized and is hence null.
Check out this answer about fetching the battery level : https://stackoverflow.com/a/4047790/1239966
You need to register batteryStatus.
IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = context.registerReceiver(null, ifilter);
Related
I am doing Android programming for the first time, I want to display a GeoServer layer using the ArcGis SDK map layer. I have done the code but it is not working, please tell me what i am doing wrong.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.subrata.mymap.MainActivity">
<com.esri.android.map.MapView
android:id="#+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
mapoptions.MapType="Aerial"
mapoptions.center="28, 77"
mapoptions.ZoomLevel="10">
</com.esri.android.map.MapView>
</RelativeLayout>
mainactivity.java
package com.example.subrata.mymap;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import com.esri.android.map.MapView;
import com.esri.android.map.ogc.WMSLayer;
public class MainActivity extends AppCompatActivity {
MapView mMapView;
WMSLayer wmsLayer;
String wmsURL;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mMapView = (MapView)findViewById(R.id.map);
wmsURL = "http://localhost:8081/geoserver/NFR-SR/wms";
wmsLayer = new WMSLayer(wmsURL);
wmsLayer.setImageFormat("application/openlayers");
// available layers
String[] visibleLayers = {"NFR-SR:Ridgeline_SR"};
wmsLayer.setVisibleLayer(visibleLayers);
wmsLayer.setOpacity(0.5f);
mMapView.addLayer(wmsLayer);
mMapView.setEsriLogoVisible(false);
mMapView.enableWrapAround(true);
}
#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);
}
}
Can't really tell what you mean by not working without any log or explanation.
Here are some possible reason:
cannot reach server at url http://localhost:8081/geoserver/NFR-SR/wms
layer name NFR-SR:Ridgeline_SR not found
map service doesn't support application/openlayers
It could even be it is working but you are viewing the map extent which does not contain any data.
After i made some changes in an AsynTask i get this error when running the app:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.popularmovies/com.example.android.popularmovies.MainActivity}: android.view.InflateException: Binary XML file line #1: Error inflating class fragment
This is the activity_main.xml file.
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/fragment"
android:name="com.example.android.popularmovies.MainActivityFragment"
tools:layout="#layout/fragment_main"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
And this is the MainActivity.java file:
package com.example.android.popularmovies;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#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);
}
}
Thanks for any help you can provide! ;)
I am not sure try the following:
Add
tools:context= ".MainActivity"
or Can you put <fragment> inside a <FrameLayout>.
Clean the code once.
I am new to Android and building a small test program and the program is not running and giving me Could not create the view: org.eclipse.pde.runtime.LogView error
here is the code from my android_main.xml file
<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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.myapplication.MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
</RelativeLayout>
Here is the java code from MainActivity.Java
package com.example.myapplication;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
I apologize that I am posting this as an answer instead of a comment, but commenting requires 50 reputation and I don't have that yet. Can you post your java code too? The problem is likely in there, it may be the method by which you are loading the view.
I am creating an android application that consists of navigation drawer in android studio.
I am getting an error called inconvertable types cannot cast "How to solve inconvertable types cannot cast "Android.support.v4.app.fragment" to "packagename"" please helpme howto solve this.
This is my activity_main.java
package sample.lakshman.com.sampleltester;
import android.content.Intent;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v7.widget.Toolbar;
import sample.lakshman.com.sampleltester.Fragment_navigation;
public class MainActivity extends ActionBarActivity {
public Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
Fragment_navigation drawer_navigation = (Fragment_navigation)getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawer_navigation.setUp((DrawerLayout)findViewById(R.id.drawer_layout),toolbar);
}
#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;
}
if(id==R.id.navigation_item)
{
Intent sub = new Intent(MainActivity.this,Subactivity.class);
startActivity(sub);
}
return super.onOptionsItemSelected(item);
}
}
This is my main_activity.xml
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<include
android:id="#+id/tool_bar"
layout="#layout/tool_bar" />
</RelativeLayout>
<fragment
android:id="#+id/fragment_navigation_drawer"
android:layout_width="250dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="#layout/fragment_fragment_navigation"
android:name="sample.lakshman.com.sampleltester.Fragment_navigation"
tools:layout="#layout/fragment_fragment_navigation" />
</android.support.v4.widget.DrawerLayout>
Just go to your Fragment_navigation class and
replace
import android.app.Fragment;
with
import android.support.v4.app.Fragment;
Friends
I am new on Android App Developing. I have nearly completed my app.
In the last stage, I'm facing difficulties and trying for the last three days to solve it but could not.
I need to get the current hour and minutes from a time picker (without Dialog) when the user clicks a button. I want to save this data to a database on this button click.
Would you anybody please help me providing just an XML and JAVA file as below.
XML:
<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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.timepicker.MainActivity" >
<TimePicker
android:id="#+id/timePicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="21dp" />
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/timePicker1"
android:layout_centerHorizontal="true"
android:layout_marginTop="77dp"
android:text="Button" />
</RelativeLayout>
Java:
package com.example.timepicker;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Using Calendar instance you can get current hour and minutes-
Calendar c;
private int mhour;
private int mminute;
initialize -
c = Calendar.getInstance();
mhour = c.get(Calendar.HOUR);
mminute = c.get(Calendar.MINUTE);
// you will get current hour and minutes of device time
Also refer this Calendar