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  • 创建一个广播机制!

     1 import android.app.Activity;
     2 import android.content.BroadcastReceiver;
     3 import android.content.Context;
     4 import android.content.Intent;
     5 import android.content.IntentFilter;
     6 import android.os.Bundle;
     7 import android.provider.Browser.BookmarkColumns;
     8 import android.util.Log;
     9 import android.view.Menu;
    10 import android.view.MenuItem;
    11 import android.view.View;
    12 import android.view.View.OnClickListener;
    13 import android.widget.Button;
    14 
    15 public class MainActivity extends Activity {
    16     Myboardcast mMyboardcast;
    17     protected String action = "发送内容";
    18 
    19     @Override
    20     protected void onCreate(Bundle savedInstanceState) {
    21         super.onCreate(savedInstanceState);
    22         setContentView(R.layout.activity_main);
    23         Button button = (Button) findViewById(R.id.btn);
    24         mMyboardcast = new Myboardcast();//创建广播
    25         IntentFilter filter = new IntentFilter();
    26         filter.addAction(action);//过滤器
    27         registerReceiver(mMyboardcast, filter);
    28         button.setOnClickListener(new OnClickListener() {
    29 
    30             @Override
    31             public void onClick(View v) {
    32                 Intent intent = new Intent();
    33                 intent.setAction(action);
    34                 MainActivity.this.sendBroadcast(intent);//发送意图
    35             }
    36         });
    37     }
    38 
    39     @Override
    40     protected void onDestroy() {
    41         unregisterReceiver(mMyboardcast);
    42         super.onDestroy();
    43     }
    44 
    45     private class Myboardcast extends BroadcastReceiver {
    46 
    47         @Override
    48         public void onReceive(Context context, Intent intent) {
    49             Log.e("Myboardcast", "收到广播!");
    50         }
    51 
    52     }
    53 }
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  • 原文地址:https://www.cnblogs.com/labixiaoxin/p/4935166.html
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