48

我想以编程方式启用/禁用数据连接。我使用了以下代码：

void enableInternet(boolean yes)
{
    ConnectivityManager iMgr = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
    Method iMthd = null;
    try {
        iMthd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class);
        } catch (Exception e) {
               } 
    iMthd.setAccessible(false);

    if(yes)
     {

                try {
                    iMthd.invoke(iMgr, true);
                    Toast.makeText(getApplicationContext(), "Data connection Enabled", Toast.LENGTH_SHORT).show();
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                     dataButton.setChecked(false);
                     Toast.makeText(getApplicationContext(), "IllegalArgumentException", Toast.LENGTH_SHORT).show();

                } catch (IllegalAccessException e) {
                    // TODO Auto-generated catch block
                    Toast.makeText(getApplicationContext(), "IllegalAccessException", Toast.LENGTH_SHORT).show();

                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    // TODO Auto-generated catch block
                     dataButton.setChecked(false);
                     Toast.makeText(getApplicationContext(), "InvocationTargetException", Toast.LENGTH_SHORT).show();

                }

     }
    else
     {
        try {
            iMthd.invoke(iMgr, true);
            Toast.makeText(getApplicationContext(), "Data connection Disabled", Toast.LENGTH_SHORT).show();
            } catch (Exception e) {
                   dataButton.setChecked(true);
                Toast.makeText(getApplicationContext(), "Error Disabling Data connection", Toast.LENGTH_SHORT).show();
                                    }
     }
}

它在模拟器中没有任何错误，但是当我尝试在真实设备上运行它时，我得到了“InvocationTargetException”。我正在使用 API 级别 8 来构建应用程序。

4

2 回答 2

90

此代码示例应该适用于运行姜饼及更高版本的 android 手机：

private void setMobileDataEnabled(Context context, boolean enabled) throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException, NoSuchMethodException, InvocationTargetException {
    final ConnectivityManager conman = (ConnectivityManager)  context.getSystemService(Context.CONNECTIVITY_SERVICE);
    final Class conmanClass = Class.forName(conman.getClass().getName());
    final Field connectivityManagerField = conmanClass.getDeclaredField("mService");
    connectivityManagerField.setAccessible(true);
    final Object connectivityManager = connectivityManagerField.get(conman);
    final Class connectivityManagerClass =  Class.forName(connectivityManager.getClass().getName());
    final Method setMobileDataEnabledMethod = connectivityManagerClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE);
    setMobileDataEnabledMethod.setAccessible(true);

    setMobileDataEnabledMethod.invoke(connectivityManager, enabled);
}

不要忘记将此行添加到您的清单文件中

<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
于 2012-07-19T06:57:53.833 回答
1

@riHaN JiTHiN 您的程序适用于 2.3 及更高版本，但它需要在“else”语句中稍作改动：

else
     {
        try {
            iMthd.invoke(iMgr, true);

“真”应改为“假”

iMthd.invoke(iMgr, false);
于 2014-04-20T11:19:45.147 回答