btn.performClick(); 该方法表明——Activity运行的时候运行该 button的点击事件的内容 ，相当于系统帮你点击了这个按钮，然后运行对应的事件 发布者：全栈程序员栈长
performClick 是使用代码主动去调用控件的点击事件（模拟人手去触摸控件） —————————————– boolean android.view.View.performClick()...@Override public void onClick(View v) { tv1.setText(“已经被点击过了”); } }); // 模拟点击事件 btn1.performClick
1. performClick()方法的作用： performClick（）方法 是使用代码主动去调用控件的点击事件（模拟人手去触摸控件） 2....使用注意事项： 如果同时使用了view.setOnTouchListener()方法，则有可能存在拦截view.performClick()的响应事件， 因为当view.OnTouchEvent()...所以也不会触发view.performClick()，而view.setOnTouchListener()相当于是重写了view.OnTouchEvent()， 所以在写view的TouchListener...处理时，需要留意view是否存在点击事件监听，如果有，则在适当的位用 view.performClick()触发点击事件。
在一个View里面覆盖了onTouchEvent 方法，会报warning Custom view overrides onTouchEvent but not performClick 处女座的我...，受不了warning 解决： 1，再覆盖一个方法： @Override public boolean performClick() { return super.performClick();...} 2，在onTouchEvent 方法里面，必须在适当的时候，调用performClick方法，如： if (event.getAction() == MotionEvent.ACTION_DOWN...) { // 如果点击 performClick(); } 搞定。
逻辑上来讲处理点击操作应该更合理的被放置在View#performClick中，这样当点击事件发生时一些访问性操作可以成功请求调用performClick。...可能意思还是不太明了，再说明一下：当你添加了一些点击操作，例如像setOnClickListener这样的，它会调用performClick才可以完成操作，但你重写了onTouch，就有可能把performClick...post(mPerformClick)) { performClick(); } 继续查找PerformClick()和performClick()的源码 private final class...()方法外，还要在onTouchEvent()的ACTION_UP（DOWN其实也可以）添加performClick()的使用 @Override public boolean performClick...() { return super.performClick(); } if (action == MotionEvent.ACTION_UP) { performClick
notifyAutofillManagerOnClick(); return performClick(); } } 在 performClick 方法中 , 调用了 li.mOnClickListener.onClick...() { // We still need to call this method to handle the cases where performClick() was called...()} - other methods on View should call it instead of * {@code performClick()} directly to make...notifyAutofillManagerOnClick(); return performClick(); } /** * Call this view's...public boolean performClick() { // We still need to call this method to handle the cases where
performClick 官方定义 官方API-View.html#performClick() Added in API level 1 public boolean performClick ()...在这里默认选择第一个，我们可以 查找到这个TextView组件后，在onCreate方法中调用 txt_channel.performClick(); 即可完成此需求。 ----
focusTaken) { // Use a Runnable and post this rather than calling // performClick...if (mPerformClick == null) { mPerformClick = new PerformClick(); }...我们先看下PerformClick类是干什么的？...private final class PerformClick implements Runnable { @Override public void run() {...方法： public boolean performClick() { // We still need to call this method to handle the cases
方法开始进行分发的 首先执行onTouchListener方法，后执行onTouchEvent方法，也就是onTouch方法优先于onClick方法执行，原因由于onClick方法在onTouchEvent方法之调用performClick... // Use a Runnable and post this rather than calling // performClick...if (mPerformClick == null) { mPerformClick = new PerformClick(); ..., ViewConfiguration.getLongPressTooltipHideTimeout()); } //在ACTION_UP中调用 public boolean performClick...()方法，performClick()中调用了onClick方法，触发onClick监听 当dispatchEvent事件分发时，只有前一个action返回为true时，后一个action才会触发 View
// Use a Runnable and post this rather than calling // performClick...if (mPerformClick == null) { mPerformClick = new PerformClick();...return false; } 发现在MotionEvent.ACTION_UP时，会调用到performClickInternal方法，而performClickInternal方法就是调用了performClick...notifyAutofillManagerOnClick(); return performClick(); } public boolean performClick...() { // We still need to call this method to handle the cases where performClick() was called
com.example.flutter_native.MainActivity$2.onClick(MainActivity.java:33) at android.view.View.performClick...(View.java:7316) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java...View.java:7290) at android.view.View.access$3600(View.java:838) at android.view.View$PerformClick.run
:159) at com.tzx.aidlinout.MainActivity.onClick(MainActivity.java:117) at android.view.View.performClick...(View.java:3514) at android.view.View$PerformClick.run(View.java:14125) at android.os.Handler.handleCallback...:159) at com.tzx.aidlinout.MainActivity.onClick(MainActivity.java:117) at android.view.View.performClick...(View.java:3514) at android.view.View$PerformClick.run(View.java:14125) at android.os.Handler.handleCallback
actions, it is recommended that * the actions be performed by implementing and calling * {@link #performClick...// Use a Runnable and post this rather than calling // performClick...post(mPerformClick)) { performClick(); }...还有一点要注意：在 ACTION_UP 中会执行 performClick() 方法： public boolean performClick() { final boolean result;...还有在onTouchEvent中若View是可点击以及当前触摸事件为ACTION_UP，会执行performClick()，回调OnClickListener的onClick方法。
if (mPerformClick == null) { mPerformClick = new PerformClick();...post(mPerformClick)) { performClick(); }...break; } return true; } return false; } public boolean performClick...分析4：OnTouchListener中返回false，则会往下执行onTouchEvent（ev）方法，onTouchEvent(ev)中会执行performClick（）方法，这时如果view设置了
mChecked = false; private boolean mBroadcasting; private boolean mTurningOn; private PerformClick... < mClickTimeout) { if (mPerformClick == null) { mPerformClick = new PerformClick...post(mPerformClick)) { performClick(); } ... implements Runnable { public void run() { performClick(); } } ...@Override public boolean performClick() { startAnimation(!
// Use a Runnable and post this rather than calling // performClick...post(mPerformClick)) { performClick();...return true; } return false; } 可以看到，我们在MotionEvent.ACTION_UP事件里面，经过一系列的判断，然后进入到了performClick...OnClickListener that was called, false * otherwise is returned. */ public boolean performClick...return result; } 这个函数很明显的就知道是执行onClick,从这就可以得到如下结论 onClick事件是在onTouchEvent的MotionEvent.ACTION_UP事件通过performClick
at com.hust.blue.xiaoxian.MainActivity$1.onClick(MainActivity.java:71) at android.view.View.performClick...(View.java:4457) at android.view.View$PerformClick.run(View.java:18491) at android.os.Handler.handleCallback
(View.java:4439) at android.widget.Button.performClick(Button.java:142) at android.view.View$PerformClick.run...(View.java:4439) at android.widget.Button.performClick(Button.java:142) at android.view.View$PerformClick.run...(View.java:4439) at android.widget.Button.performClick(Button.java:142) at android.view.View$PerformClick.run...(View.java:4439) 04-27 20:11:40.890: E/TestinAgent(16432): at android.widget.Button.performClick(Button.java...:142) 04-27 20:11:40.890: E/TestinAgent(16432): at android.view.View$PerformClick.run(View.java:18395
com.example.flutter_native.MainActivity$1.onClick(MainActivity.java:63) at android.view.View.performClick...(View.java:6597) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java...View.java:6574) at android.view.View.access$3100(View.java:778) at android.view.View$PerformClick.run
android.widget.RadioButton.toggle(RadioButton.java:76) 09-20 15:26:51.922: W/System.err(21923): at android.widget.CompoundButton.performClick...(CompoundButton.java:99) 09-20 15:26:51.922: W/System.err(21923): at android.view.View$PerformClick.run...RadioButton.java:76) 09-20 15:26:51.986: E/AndroidRuntime(21923): at android.widget.CompoundButton.performClick...(CompoundButton.java:99) 09-20 15:26:51.986: E/AndroidRuntime(21923): at android.view.View$PerformClick.run
领取专属 10元无门槛券
手把手带您无忧上云
云服务器
ICP备案
对象存储
实时音视频
即时通信 IM
