android 之 Intent、broadcast
Intent的功能有：
在mainActivity中為按鈕1添加監聽事件：
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", "這是來自mainActivity的數據");
startActivityForResult(intent1, REQUEST_CODE);}
};
在Activity1中接收來自mainActivity中Intent中的數據：
String data = null;
Bundle extras = getIntent().getExtras();
if (extras != null) {
data = extras.getString("mainActivity");
}
setTitle("現在在Activity1裏：" + data);
為Activity1中的按鈕添加監聽事件，返回一個Intent：
listener1 = new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Bundle bundle = new Bundle();
bundle.putString("store", "數據來自Activity1");
Intent mIntent = new Intent();
mIntent.putExtras(bundle);
setResult(RESULT_OK, mIntent);finish();
}
};
在mainActivity中覆寫onActivityResult（）方法，對返回的內容處理：
@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);
}
}
}
為按鈕2添加監聽事件：
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);
}
};
添加一個Broadcast Receiver，其捕獲action為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中註冊：
<receiver android:name=".broadcastReceive1">
<intent-filter>
<action android:name="com.sunny.action.BROADCASE" />
</intent-filter>
</receiver>
Intent的功能有：
在mainActivity中為按鈕1添加監聽事件：
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", "這是來自mainActivity的數據");
startActivityForResult(intent1, REQUEST_CODE);
}
};
在Activity1中接收來自mainActivity中Intent中的數據：
String data = null;
Bundle extras = getIntent().getExtras();
if (extras != null) {
data = extras.getString("mainActivity");
}
setTitle("現在在Activity1裏：" + data);
為Activity1中的按鈕添加監聽事件，返回一個Intent：
listener1 = new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Bundle bundle = new Bundle();
bundle.putString("store", "數據來自Activity1");
Intent mIntent = new Intent();
mIntent.putExtras(bundle);
setResult(RESULT_OK, mIntent);
finish();
}
};
在mainActivity中覆寫onActivityResult（）方法，對返回的內容處理：
@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);
}
}
}
為按鈕2添加監聽事件：
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);
}
};
添加一個Broadcast Receiver，其捕獲action為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中註冊：
<receiver android:name=".broadcastReceive1">
<intent-filter>
<action android:name="com.sunny.action.BROADCASE" />
</intent-filter>
</receiver>
android 之 Intent、broadcast