Android中的广播用的太多了，今天稍微总结一下。
按注册方式分为两种：
1.静态注册广播：
静态注册广播就是在androidManifest.xml文件中注册广播，假设我们要实现这样一个效果，在一个activity上点击按钮，发送一条广播，这条广播弹出一个toast，显示“静态”二字。
先看看广播接受者：
public class MyBroadcast extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context,"静态", Toast.LENGTH_LONG).show();
}
}
清单文件中注册：
<receiver android:name="com.example.staticbroadcast.MyBroadcast" >
<intent-filter>
<action android:name="com.test.StaticBroadcast" />
</intent-filter>
</receiver>
activity中的点击事件（发送广播）：
this.static_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setAction("com.test.StaticBroadcast");
sendBroadcast(intent);
}
});
2.动态注册：
动态注册一般是在activity中的onStart()方法中注册，在onStop()方法中解除注册，代码如下：
public class MainActivity extends Activity {
private Button static_btn;
private Button dynamic_btn;
private BroadcastReceiver myBroadcastReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.static_btn = (Button) this.findViewById(R.id.button1);
this.dynamic_btn = (Button) this.findViewById(R.id.Button01);
myBroadcastReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(MainActivity.this,"你好，这里是动态广播！", Toast.LENGTH_LONG).show();
}
};
// this.static_btn.setOnClickListener(new OnClickListener() {
//
// @Override
// public void onClick(View v) {
// Intent intent = new Intent();
// intent.setAction("com.test.StaticBroadcast");
// sendBroadcast(intent);
// }
// });
this.dynamic_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//发送广播
Intent intent = new Intent();
intent.setAction("DynamicBroadcast");
sendBroadcast(intent);
}
});
}
@Override
protected void onStart() {
super.onStart();
//注册广播
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("DynamicBroadcast");
registerReceiver(myBroadcastReceiver, intentFilter);
}
@Override
protected void onStop() {
super.onStop();
//取消注册
unregisterReceiver(myBroadcastReceiver);
}
}
