Android一句话区分sendBroadcast与sendStickyBroadcast
来源:互联网 发布:java独立开发 编辑:程序博客网 时间:2024/04/27 08:06
转载自http://blog.csdn.net/weidi1989/article/details/8469935
小例实现步骤:
①.在MainActivity里面发送两种类型的广播:sendBroadcast和sendStickyBroacat。
②在ReceverActivity里面通过BroadcastReceiver来接收这两个消息,这里是通过代码来注册Recevier而不是在Manifest里面注册的。
③结论:通过sendBroadcast中发出的intent在ReceverActivity不处于onResume状态是无法接受到的,即使后面再次使其处于该状态也无法接受到。而sendStickyBroadcast发出的Intent当ReceverActivity重新处于onResume状态之后就能重新接受到其Intent。这就是the Intent will be held to be re-broadcast to future receivers这句话的表现。就是说sendStickyBroadcast发出的最后一个Intent会被保留,下次当Recevier处于活跃的时候,又会接受到它。
④在wifi中就是发送的粘性广播。
下面是两个类的代码部分。
MainActivity:
- public class MainActivity extends Activity {
- Button btnSendi;
- Button btnSends;
- Button btnStart;
- Context mContext;
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- btnSendi=(Button) findViewById(R.id.sendi);
- btnSends=(Button) findViewById(R.id.sends);
- btnStart=(Button) findViewById(R.id.start);
- mContext=getApplicationContext();
- btnSendi.setOnClickListener(new OnClickListener(){
- @Override
- public void onClick(View v) {
- // TODO Auto-generated method stub
- Intent intent = new Intent();
- intent.setAction("com.android.my.action");
- intent.setFlags(1);
- mContext.sendBroadcast(intent);
- }
- });
- btnStart.setOnClickListener(new OnClickListener(){
- @Override
- public void onClick(View v) {
- // TODO Auto-generated method stub
- Intent intent = new Intent(MainActivity.this,ReceiverActivity.class);
- startActivity(intent);
- }
- });
- btnSends.setOnClickListener(new OnClickListener(){
- @Override
- public void onClick(View v) {
- // TODO Auto-generated method stub
- Intent intent = new Intent();
- intent.setAction("com.android.my.action.sticky");
- intent.setFlags(2);
- mContext.sendStickyBroadcast(intent);
- }
- });
- }
- }
ReceiverActivity :
- public class ReceiverActivity extends Activity {
- private IntentFilter mIntentFilter;
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- mIntentFilter = new IntentFilter();
- mIntentFilter.addAction("com.android.my.action");
- mIntentFilter.addAction("com.android.my.action.sticky");
- }
- private BroadcastReceiver mReceiver = new BroadcastReceiver() {
- @Override
- public void onReceive(Context context, Intent intent) {
- final String action = intent.getAction();
- System.out.println("action"+action);
- }
- };
- @Override
- protected void onResume() {
- // TODO Auto-generated method stub
- super.onResume();
- registerReceiver(mReceiver, mIntentFilter);
- }
- @Override
- protected void onPause() {
- // TODO Auto-generated method stub
- super.onPause();
- unregisterReceiver(mReceiver);
- }
- }
- Android一句话区分sendBroadcast与sendStickyBroadcast
- Android一句话区分sendBroadcast与sendStickyBroadcast
- sendBroadcast与sendStickyBroadcast的区别
- sendBroadcast与sendStickyBroadcast的区别
- Android学习 - sendBroadcast和sendStickyBroadcast
- sendStickyBroadcast && sendBroadcast
- sendBroadcast和sendStickyBroadcast的区别
- sendBroadcast和sendStickyBroadcast的区别
- sendBroadcast和sendStickyBroadcast的区别
- sendBroadcast和sendStickyBroadcast的区别
- sendBroadcast和sendStickyBroadcast的区别
- sendBroadcast和sendStickyBroadcast的区别
- sendStickyBroadcast与Sticky Intent
- Java 一句话区分重载与重写
- sendBroadcast
- [来自燕十三的问候]一句话区分having与where
- android sendBroadcast 卡死问题
- Android sendBroadcast的过程分析
- [NSCFType XXX]: unrecognized selector sent to instance 0x4d80b00'
- 添加交叉编译工具进入系统的环境变量
- java gc
- 算法--顺序统计-期望线性时间做选择
- gcc编译静态库和动态库
- Android一句话区分sendBroadcast与sendStickyBroadcast
- leetcode 100: Simplify Path
- Fatal error: Class 'ZipArchive' not found的解决办法
- android屏幕自适应
- SSH框架与SSI框架的区别
- javascript的变量
- XNA游戏绘图
- 打开网页输入用户名和密码时,字体非常小,只显示————————
- Nginx http_core模块 配置文件解析