آموزش بهترین تمرینات اندروید

EditText
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/editText"
   android:layout_alignParentRight="true"
   android:layout_alignParentEnd="true"
   android:hint="User Name"
   android:layout_below="@+id/imageView"
   android:layout_alignLeft="@+id/imageView"
   android:layout_alignStart="@+id/imageView"
   android:numeric="integer" />

<EditText
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/editText2"
   android:layout_alignLeft="@+id/editText"
   android:layout_alignStart="@+id/editText"
   android:hint="Pass Word"
   android:layout_below="@+id/editText"
   android:layout_alignRight="@+id/editText"
   android:layout_alignEnd="@+id/editText"
   android:password="true" />

IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = context.registerReceiver(null, ifilter);

// Are we charging / charged? Full or charging.
int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);

// How are we charging? From AC or USB.
int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);

package com.example.sairamkrishna.myapplication;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;

import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;

import android.os.BatteryManager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;

import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.Set;

public class MainActivity extends ActionBarActivity {
   EditText ed1,ed2;
   Button b1;
   
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      
      ed1=(EditText)findViewById(R.id.editText);
      ed2=(EditText)findViewById(R.id.editText2);
      b1=(Button)findViewById(R.id.button);
      
      b1.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
            Intent batteryStatus = registerReceiver(null, ifilter);
            
            int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
            boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
            status == BatteryManager.BATTERY_STATUS_FULL;
            
            int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED,-1);
            boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
            boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;
            
            if(usbCharge){
               Toast.makeText(getApplicationContext(),"Mobile is charging on USB",Toast.LENGTH_LONG).show();
            }
            else
            {
               Toast.makeText(getApplicationContext(),"Mobile is charging on AC",Toast.LENGTH_LONG).show();
            }
         }
      });
   }
   
   @Override
   protected void onDestroy() {
      super.onDestroy();
   }
   
   @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);
   }
}

<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=".MainActivity">

   <TextView android:text="Bluetooth Example" android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:id="@+id/textview"

      android:textSize="35dp"

      android:layout_alignParentTop="true"

      android:layout_centerHorizontal="true" />

   <TextView

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Tutorials point"

      android:id="@+id/textView"

      android:layout_below="@+id/textview"

      android:layout_centerHorizontal="true"

      android:textColor="#ff7aff24"

      android:textSize="35dp" />

   <ImageView

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:id="@+id/imageView"

      android:src="@drawable/abc"

      android:layout_below="@+id/textView"

      android:layout_centerHorizontal="true" />

   <EditText

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:id="@+id/editText"

      android:layout_alignParentRight="true"

      android:layout_alignParentEnd="true"

      android:hint="User Name"

      android:layout_below="@+id/imageView"

      android:layout_alignLeft="@+id/imageView"

      android:layout_alignStart="@+id/imageView"

      android:numeric="integer" />

   <EditText

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:id="@+id/editText2"

      android:layout_alignLeft="@+id/editText"

      android:layout_alignStart="@+id/editText"

      android:hint="Pass Word"

      android:layout_below="@+id/editText"

      android:layout_alignRight="@+id/editText"

      android:layout_alignEnd="@+id/editText"

      android:password="true" />

   <Button

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Check"

      android:id="@+id/button"

      android:layout_below="@+id/editText2"

      android:layout_centerHorizontal="true" />

</RelativeLayout>

<resources>

    <string name="app_name">My Application</string>

    <string name="hello_world">Hello world!</string>

    <string name="action_settings">Settings</string>

</resources>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.example.bestpractices"
   android:versionCode="1"
   android:versionName="1.0" >

   <application
      android:allowBackup="true"
      android:icon="@drawable/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/AppTheme" >
      
      <activity
         android:name="com.example.bestpractices.MainActivity"
         android:label="@string/app_name" >
         
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      
      </activity>
      
   </application>
</manifest>