Question

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地工作但是，我得到了＃34; InvocationTargetException＆＃34;当我尝试在真实设备上运行它时。我使用API级别8来构建应用程序。

Answer 1

此代码示例适用于运行gingerbread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);
}

别忘了将此行添加到您的清单文件

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

Answer 2

@riHaN JiTHiN你的程序适用于2.3及以上版本，但它需要在“其他”中进行一些小改动。语句：

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

＆＃39; true＆＃39;应更改为“假”＆＃39;

iMthd.invoke(iMgr, false);

以编程方式在android中启用/禁用数据连接

2 个答案: