我想通过编程方式启用/禁用数据连接。 我已经使用了以下代码:
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();
}
}
}
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时,出现了“InvocationTargetException”错误。
我正在使用API级别8构建应用程序。
InvocationTargetException
的e.getMessage()
方法返回什么结果?内部异常呢? - Greyson