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android 之 Intent、broadcast

2011-04-18 18:09 197 查看

Intent的功能有：

在mainActivity中为按钮1添加监听事件：

listener1 = new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent1 = new Intent(mainActivity.this, Activity1.class);
intent1.putExtra("mainActivity", "这是来自mainActivity的数据");
startActivityForResult(intent1, REQUEST_CODE);
}
};

在Activity1中接收来自mainActivity中Intent中的数据：

String data = null;
Bundle extras = getIntent().getExtras();
if (extras != null) {
data = extras.getString("mainActivity");
}
setTitle("现在在Activity1里：" + data);

为Activity1中的按钮添加监听事件，返回一个Intent：

listener1 = new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Bundle bundle = new Bundle();
bundle.putString("store", "数据来自Activity1");
Intent mIntent = new Intent();
mIntent.putExtras(bundle);
setResult(RESULT_OK, mIntent);
finish();
}
};

在mainActivity中覆写onActivityResult（）方法，对返回的内容处理：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE) {
if (resultCode == RESULT_CANCELED) {
setTitle("取消");
} else if (resultCode == RESULT_OK) {
String temp = null;
Bundle extras = data.getExtras();
if (extras != null) {
temp = extras.getString("store");
}
setTitle("在mainActivity中："+temp);
}
}
}

为按钮2添加监听事件：

protected static final String ACTION1 = "com.sunny.action.BROADCASE";

listener2 = new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent2 = new Intent(ACTION1);
sendBroadcast(intent2);
}
};

添加一个Broadcast Receiver，其捕获action为com.sunny.action.BROADCASE的Intent，生成Notification：

public class broadcastReceive1 extends BroadcastReceiver {
private static final int NOTIFICATION_ID = 0;
Context context;

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
this.context=context;
showNotification();
}

private void showNotification() {
// TODO Auto-generated method stub
NotificationManager notificationManager=(NotificationManager) context.getSystemService(android.content.Context.NOTIFICATION_SERVICE);
Notification notification=new Notification(R.drawable.icon, "在broadcastReceive1中",System.currentTimeMillis());
PendingIntent contentIntent=PendingIntent.getActivity(context, 0, new Intent(context,mainActivity.class), 0);
notification.setLatestEventInfo(context, "在broadcastReceive1中：", null, contentIntent);
notificationManager.notify(NOTIFICATION_ID, notification);
}

}

其在AndroidManifest.xml中注册：

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