StickyIntentBroadcastReceiverActivity.java
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import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.BatteryManager; import android.os.Bundle; import android.widget.TextView; public class StickyIntentBroadcastReceiverActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final TextView currentStateView = (TextView) findViewById(R.id.level); registerReceiver(new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(Intent.ACTION_BATTERY_CHANGED)) { String age = "Reading taken recently"; if (isInitialStickyBroadcast()) { age = "Reading may be stale"; } currentStateView.setText("Current Battery Level:" + String.valueOf(intent.getIntExtra( BatteryManager.EXTRA_LEVEL, -1)) + System.getProperty("line.separator") + age); } } }, new IntentFilter(Intent.ACTION_BATTERY_CHANGED)); } } |
main.xml
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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/level" android:layout_width="wrap_content" android:layout_height="wrap_content"> </TextView> </LinearLayout> |