4

如果 num>50,我想关闭飞行模式,我实现了这段代码(来自Android 中的 Toggle plane mode),但是执行时我强制关闭,有人可以帮忙吗?

                if(num>50){
                    // read the airplane mode setting
                    boolean isEnabled = Settings.System.getInt(
                          getContentResolver(), 
                          Settings.System.AIRPLANE_MODE_ON, 0) == 1;

                    // toggle airplane mode
                    Settings.System.putInt(
                          getContentResolver(),
                          Settings.System.AIRPLANE_MODE_ON, isEnabled ? 0 : 1);

                    // Post an intent to reload
                    Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
                    intent.putExtra("state", !isEnabled);
                    sendBroadcast(intent);



                }

好的,我实现了预感,但我想更改 if 语句:

if num>=50 and airplane mode=on toggle it off 
if  airplane mode=off and num<50 toggle it on

有人可以帮我编写新代码吗?(我是新手)

4

3 回答 3

8

您很可能没有将WRITE_SETTING权限添加到您的AndroidManifest.xml

<uses-permission android:name="android.permission.WRITE_SETTINGS" />

另请注意代码:

 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
 intent.putExtra("state", !isEnabled);
 sendBroadcast(intent);

不应该工作,因为根据以下文档ACTION_AIRPLANE_MODE_CHANGED

这是一个只能由系统发送的受保护意图。

即使您目前可以在没有系统权限的情况下发送此广播,但它可能会在未来的 Android 版本中发生变化。

于 2011-08-15T15:00:49.540 回答
3

确保在你的 android manifest 中设置了切换飞行模式的权限。

看看这里在 Android 中切换飞行模式

于 2011-08-15T14:56:34.653 回答
1

参考以下代码:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    IntentFilter intentFilter = new IntentFilter("android.intent.action.SERVICE_STATE");

    BroadcastReceiver receiver = new BroadcastReceiver() {
          @Override
          public void onReceive(Context context, Intent intent) {
                Log.d("AirplaneMode", "Service state changed");
                Toast.makeText(getApplicationContext(), "Service state changed", Toast.LENGTH_LONG).show();
                boolean isEnabled = isAirplaneModeOn(context);
            /*   setSettings(context, isEnabled?1:0);
                Intent intent_mode = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
               intent_mode.putExtra("state", !isEnabled);
                context.sendBroadcast(intent_mode);*/

                if(isEnabled==true)
                { setSettings(context, isEnabled?1:0);
                    Toast.makeText(getApplicationContext(), "Flight mode on", Toast.LENGTH_LONG).show();
                    Settings.System.putInt(getContentResolver(), Settings.System.AIRPLANE_MODE_ON, 0);
                    Intent newIntent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
                    newIntent.putExtra("state", false);
                    sendBroadcast(newIntent);
                }
                else
                { setSettings(context, isEnabled?1:0);
                    Toast.makeText(getApplicationContext(), "Flight mode off", Toast.LENGTH_LONG).show();
                }

          }

        @SuppressLint("NewApi")
        private void setSettings(Context context, int value) {
            // TODO Auto-generated method stub

            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
                Settings.System.putInt(
                          context.getContentResolver(),
                          Settings.System.AIRPLANE_MODE_ON, value);
            } else {
                Settings.Global.putInt(
                          context.getContentResolver(),
                          Settings.Global.AIRPLANE_MODE_ON, value);
            }       

        }

        @SuppressLint("NewApi")
        public boolean isAirplaneModeOn(Context context) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
            return Settings.System.getInt(context.getContentResolver(), 
                    Settings.System.AIRPLANE_MODE_ON, 0) != 0;          
        } else {
            return Settings.Global.getInt(context.getContentResolver(), 
                    Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
        }       
    }
    };

    registerReceiver(receiver, intentFilter);


}

//permissions needed:

// //

于 2013-12-31T06:07:24.913 回答