有序广播
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
package com.example.lenovo.guangbo;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void bt_1(View v)
{
//发送一般广播
//使用action属性指定广播频率
Intent intent=new Intent("com.hanqi.gunagbo.test2");
intent.putExtra("name","广播发送测试");
//发送
sendBroadcast(intent);
Toast.makeText(MainActivity.this, "一般广播已发出", Toast.LENGTH_SHORT).show();
}
MyReceiver myReceiver;
//动态注册
public void bt_2(View v)
{
myReceiver=new MyReceiver();
IntentFilter intentFilter = new IntentFilter("com.hanqi.guangbo.test2");
intentFilter.setPriority(100);
registerReceiver(myReceiver, intentFilter);
}
public void bt_3(View v)
{
//发送有序广播
Intent intent=new Intent("com.hanqi.gunagbo.test1");
intent.putExtra("name","广播发送测试");
//发送
sendOrderedBroadcast(intent, null);
Toast.makeText(MainActivity.this, "有序广播已发出", Toast.LENGTH_SHORT).show();
}
//反注册,onDestroy()
@Override
protected void onDestroy() {
if (myReceiver!=null) {
unregisterReceiver(myReceiver);
}
super.onDestroy();
}
}
优先级
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
package com.example.lenovo.guangbo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class MyReceiver extends BroadcastReceiver {
public MyReceiver() {
Log.e("TAG","MyReceiver被实例化");
}
@Override
public void onReceive(Context context, Intent intent) {
if (isOrderedBroadcast()) {
//阻断
abortBroadcast();
}
//
String str=intent.getStringExtra("name");
intent.putExtra("name1","这是被修改的内容");
//再重新发送
//context.sendOrderedBroadcast(intent,null);
Toast.makeText(context, "MyReceiver1收到的广播:"+str, Toast.LENGTH_SHORT).show();
}
}
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
package com.example.lenovo.guangbo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class MyReceiver2 extends BroadcastReceiver {
public MyReceiver2() {
}
@Override
public void onReceive(Context context, Intent intent) {
String str=intent.getStringExtra("name1");
Toast.makeText(context, "MyReceiver2收到的广播:" + str, Toast.LENGTH_SHORT).show();
}
}
静态优先级
<intent-filter android:priority="1000">
动态优先级
intentFilter.setPriority(100);