1 public class MainActivity extends AppCompatActivity {
 2 
 3     @Override
 4     protected void onCreate(Bundle savedInstanceState) {
 5         super.onCreate(savedInstanceState);
 6         setContentView(R.layout.activity_main);
 7 
 8         Button btn1 = findViewById(R.id.btn1);
 9         Button btn2 = findViewById(R.id.btn2);
10 
11         btn1.setOnClickListener(new View.OnClickListener() {
12             @Override
13             public void onClick(View v) {
14                 Intent intent = new Intent();
15                 intent.setAction("hemeiwolong");
16                 intent.setPackage("com.mingrisoft.broadcast");　　//如果没有这句，将无法开启广播接收类接收广播，但程序不会崩溃，参数为此activity所在包路径
17                 sendBroadcast(intent);
18             }
19         });
20     }
21 }