[Android]BroadcastReceiver最基本應用入門

專案參考：第二十一讲：Broadcast Receiver 使用入门

AndroidManifest：

//插入在/activity之後
/activity

//設定receiver存在的class

        receiver android:name="recive"

            intent-filter

//設定receiver存在的class中的 broadcast action 可以多重設定

                action android:name="show_toast" /

                action android:name="show_dialog" /

            /intent-filter

        /receiver

    /application
//以及/application之前

//左右箭頭 < >自己記得加 註解記得拿掉～

主程式MainActivity.java ：

public class MainActivity extends Activity {

private Button toast;

private Button Adialog;

private String toastss = "toast";

private String dialogss = "dialog";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

toast = (Button)this.findViewById(R.id.bt1);

Adialog = (Button)this.findViewById(R.id.bt2);

toast.setOnClickListener(new Button.OnClickListener(){

  public void onClick(View v){

  Intent intent = new Intent("toast");

  intent.setAction("show_toast");

  intent.putExtra("hello",toastss);

  sendBroadcast(intent);   

}

});

Adialog.setOnClickListener(new Button.OnClickListener(){

  public void onClick(View v){

  Intent intent = new Intent("toast");

  intent.setAction("show_dialog");

  intent.putExtra("hello",dialogss);

  sendBroadcast(intent);   

}

});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

}

副程式recive.java ： 

public class recive extends BroadcastReceiver {

private Toast toast;

private AlertDialog show;

@Override

public void onReceive(Context context, Intent intent) {

if(intent.getAction().equals("show_toast")){

String toastv = intent.getExtras().getString("hello");

Log.e("show_toast", toastv+"Say Hello to Yaoyao !!!!!");

//toast = Toast.makeText(getApplicationContext(),toastv,Toast.LENGTH_LONG);

 //toast.setDuration(Toast.LENGTH_LONG);// show的時間長短正規寫法 LONG長 SHORT短

 // 3個屬性分別為Gravity,x座標,y座標

 //toast.setGravity(Gravity.CENTER_HORIZONTAL|Gravity.TOP,0,100);

 //toast.show();

}

if(intent.getAction().equals("show_dialog")){

String dialog = intent.getExtras().getString("hello");

Log.e("show_dialog", dialog+"Say Hello to Yaoyao !!!!!");

//show = new AlertDialog.Builder(this).setTitle(dialog)

   //.setMessage("您好")

   //.setPositiveButton("OK", new DialogInterface.OnClickListener() {

    //public void onClick(DialogInterface dialog, int which) {

    //}

   //}).show();

}

}

}

執行結果：

後記：本來想用Broadcast 來啟動開啟toast 跟 alertdialog 但是

我另外一個副程式 是 public class recive extends BroadcastReceiver 

不是activity所以不能設定view

不過我會補完 這是下一個目標～