以编程方式在android中启用/禁用数据连接
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Enable/disable data connection in android programmatically
提问by JiTHiN
I want to enable/disable the data connection programmatically. I've used the following code:
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();
}
}
}
It's working without any errors in the emulator but, I'm getting "InvocationTargetException" when I try to run it on a real device. I'm using API level 8 to build the application.
它在模拟器中工作没有任何错误，但是，当我尝试在真实设备上运行它时，我收到了“InvocationTargetException”。我正在使用 API 级别 8 来构建应用程序。
回答by Tobias Moe Thorstensen
This code sample should work for android phones running gingerbread and higher:
此代码示例适用于运行姜饼及更高版本的安卓手机：
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);
}
Dont forget to add this line to your manifest file
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"/>
回答by Ashish Ranjan
@riHaN JiTHiN your program works fine for 2.3 and above, But it needs a small change in 'else' statement:
@riHaN JiTHiN 您的程序适用于 2.3 及更高版本，但需要在“else”语句中稍作改动：
else
{
try {
iMthd.invoke(iMgr, true);
the 'true' should be changed to 'false'
“真”应该改为“假”
iMthd.invoke(iMgr, false);
