int _RadioButtonId = mRadioButtonGroup.getCheckedRadioButtonId(); View _RadioButton = mRadioButtonGroup.findViewById(_RadioButtonId ); int _Idx = mRadioButtonGroup.indexOfChild(_RadioButton); ((RadioButton)mRadioButtonGroup.getChildAt(_Idx)).setChecked(true); …

MediaRecorder进行录屏或摄像是怎么关闭声音？那是关闭Mic？不是的，这样根本不起作用。其实，最简单的方法就是不进行设置声音相关参数，就OK了。 pMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); pMediaRecorder.setAudioSamplingRate(44100); pMediaRecorder.setAudioEncodingBitRate(96000); pMediaRecorder.setAudioEncode…

RecyclerView notifyItemRangeChanged(0, pChannels.size()); 出现下面异常： java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid view holder adapter positionViewHolder{f1265e3 position=4 id=-1, oldPos=1, pLpos:1 scrap [attachedScrap] tmpDetached no paren…

搜索关键字“Android 显示触摸操作代码”，结果都是进入设置页面的开发者模式下进行打开。其实，想用代码进行控制。那就搜索“android  show visual feedback for touches”，OK，这就可以找到想要的结果了。 代码如下： To enable show touches: Settings.System.putInt(context.getContentResolver(), "show_touches", 1); To disable show touches: Settings.…

public class FragmentSetting extends PreferenceFragment {} @Override public void onAttach(Context pContext) { //not working super.onAttach(pContext); if (pContext instanceof AppCompatActivity){ mActivity = (AppCompatActivity)pContext; } } @Override public void…

adb： adb root adb shell am start -n android/com.android.internal.app.PlatLogoActivity is ok __________________________________________________________ intent： Intent _intent = new Intent(Intent.ACTION_MAIN); _intent.setClassName("android", "com.android.interna…

只是备注一下。 原文地址：http://developer.android.com/intl/zh-cn/guide/topics/security/permissions.html System permissions are divided into several protection levels. The two most important protection levels to know about are normal and dangerous permissions: Normal permi…