Actvity中TextView的Touch事件
16lz
2021-01-26
package com.domo.touch; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.TextView; public class TestTouchActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TextView textView = (TextView) findViewById(R.id.textview); textView.setOnTouchListener(new OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub switch (event.getAction()) { case MotionEvent.ACTION_DOWN: Log.v("TAG", "TextView: ACTION_DOWN" + MotionEvent.ACTION_DOWN); break; case MotionEvent.ACTION_UP: Log.v("TAG", "TextView : ACTION_UP" + MotionEvent.ACTION_UP); break; default: break; } return false;//注意：return false } }); } @Override public boolean dispatchTouchEvent(MotionEvent ev) { // TODO Auto-generated method stub switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: Log.v("TAG", "Activity_dis: ACTION_DOWN" + MotionEvent.ACTION_DOWN); break; case MotionEvent.ACTION_UP: Log.v("TAG", "Activity_dis: ACTION_UP" + MotionEvent.ACTION_UP); break; default: break; } Log.v("TAG", "Activity_dis: " + super.dispatchTouchEvent(ev)); return super.dispatchTouchEvent(ev);//注意 } } 代码图如上：当dispatchTouchEvent的返回值为super.dispatchTouchEvent(ev)时，获取到super.dispatchTouchEvent(ev)为False；点击Textview的显示的结果为
04-28 01:09:32.978: V/TAG(5733): Activity_dis: ACTION_DOWN0 04-28 01:09:32.978: V/TAG(5733): TextView: ACTION_DOWN0 04-28 01:09:32.978: V/TAG(5733): Activity_dis: false 04-28 01:09:32.978: V/TAG(5733): TextView: ACTION_DOWN0 //TextView只能获取到Down事件 04-28 01:09:33.068: V/TAG(5733): Activity_dis: false 04-28 01:09:33.088: V/TAG(5733): Activity_dis: ACTION_UP1 04-28 01:09:33.088: V/TAG(5733): Activity_dis: false当 dispatchTouchEvent的返回值为 false时；点击Textview的显示的结果为
public boolean dispatchTouchEvent(MotionEvent ev) { // TODO Auto-generated method stub switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: Log.v("TAG", "Activity_dis: ACTION_DOWN" + MotionEvent.ACTION_DOWN); break; case MotionEvent.ACTION_UP: Log.v("TAG", "Activity_dis: ACTION_UP" + MotionEvent.ACTION_UP); break; default: break; } Log.v("TAG", "Activity_dis: " + super.dispatchTouchEvent(ev)); return false; //即这里改为False时 } 1 04-28 01:14:25.467: V/TAG(5884): Activity_dis: ACTION_DOWN02 04-28 01:14:25.467: V/TAG(5884): TextView: ACTION_DOWN0 //只能获取到一次Down事件3 04-28 01:14:25.467: V/TAG(5884): Activity_dis: false4 04-28 01:14:25.571: V/TAG(5884): Activity_dis: ACTION_UP15 04-28 01:14:25.571: V/TAG(5884): Activity_dis: false当 dispatchTouchEvent的返回值为 true时；点击Textview的显示的结果为：
1 04-28 01:17:00.398: V/TAG(5995): Activity_dis: ACTION_DOWN02 04-28 01:17:00.398: V/TAG(5995): TextView: ACTION_DOWN0 // 效果没见发生变化3 04-28 01:17:00.398: V/TAG(5995): Activity_dis: false4 04-28 01:17:00.418: V/TAG(5995): Activity_dis: ACTION_UP15 04-28 01:17:00.418: V/TAG(5995): Activity_dis: false下面在 Activity中添加 onThouchEvent事件详细代码见下面
package com.domo.touch; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.TextView; public class TestTouchActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TextView textView = (TextView) findViewById(R.id.textview); textView.setOnTouchListener(new OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub switch (event.getAction()) { case MotionEvent.ACTION_DOWN: Log.v("TAG", "TextView: ACTION_DOWN" + MotionEvent.ACTION_DOWN); break; case MotionEvent.ACTION_UP: Log.v("TAG", "TextView : ACTION_UP" + MotionEvent.ACTION_UP); break; default: break; } return false; } }); } @Override public boolean dispatchTouchEvent(MotionEvent ev) { // TODO Auto-generated method stub switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: Log.v("TAG", "Activity_dis: ACTION_DOWN" + MotionEvent.ACTION_DOWN); break; case MotionEvent.ACTION_UP: Log.v("TAG", "Activity_dis: ACTION_UP" + MotionEvent.ACTION_UP); break; default: break; } Log.v("TAG", "Activity_dis: " + super.dispatchTouchEvent(ev)); return true;//注意 } @Override public boolean onTouchEvent(MotionEvent event) {//在Activity中添加了onTouchEvent事件 // TODO Auto-generated method stub switch (event.getAction()) { case MotionEvent.ACTION_DOWN: Log.v("TAG", "onTouchEvent: ACTION_DOWN" + MotionEvent.ACTION_DOWN); break; case MotionEvent.ACTION_UP: Log.v("TAG", "onTouchEvent: ACTION_UP" + MotionEvent.ACTION_UP); break; default: break; } Log.v("TAG", "onTouchEvent: " + super.onTouchEvent(event)); return super.onTouchEvent(event);//注意 } } 点击Textview结果： 04-28 01:22:11.957: V/TAG(6152): Activity_dis: ACTION_DOWN004-28 01:22:11.957: V/TAG(6152): TextView: ACTION_DOWN0 //还是只有一次04-28 01:22:11.957: V/TAG(6152): onTouchEvent: ACTION_DOWN0 04-28 01:22:11.957: V/TAG(6152): onTouchEvent: false04-28 01:22:11.957: V/TAG(6152): Activity_dis: false04-28 01:22:12.047: V/TAG(6152): Activity_dis: ACTION_UP104-28 01:22:12.047: V/TAG(6152): onTouchEvent: ACTION_UP104-28 01:22:12.058: V/TAG(6152): onTouchEvent: false04-28 01:22:12.058: V/TAG(6152): Activity_dis: false把return super.onTouchEvent(event);改为 return false;
点击Textview结果：
04-28 01:25:17.378: V/TAG(6152): Activity_dis: ACTION_DOWN004-28 01:25:17.378: V/TAG(6152): TextView: ACTION_DOWN0 //依然只有一次04-28 01:25:17.378: V/TAG(6152): onTouchEvent: ACTION_DOWN004-28 01:25:17.378: V/TAG(6152): onTouchEvent: false04-28 01:25:17.378: V/TAG(6152): Activity_dis: false04-28 01:25:17.468: V/TAG(6152): Activity_dis: ACTION_UP104-28 01:25:17.468: V/TAG(6152): onTouchEvent: ACTION_UP104-28 01:25:17.468: V/TAG(6152): onTouchEvent: false04-28 01:25:17.468: V/TAG(6152): Activity_dis: false再把public boolean dispatchTouchEvent(MotionEvent ev) { 也返回 returnfalse;
04-28 01:27:16.178: V/TAG(6304): Activity_dis: ACTION_DOWN004-28 01:27:16.178: V/TAG(6304): TextView: ACTION_DOWN0 //依然只有一次04-28 01:27:16.178: V/TAG(6304): onTouchEvent: ACTION_DOWN004-28 01:27:16.178: V/TAG(6304): onTouchEvent: false04-28 01:27:16.178: V/TAG(6304): Activity_dis: false04-28 01:27:16.298: V/TAG(6304): Activity_dis: ACTION_UP104-28 01:27:16.298: V/TAG(6304): onTouchEvent: ACTION_UP104-28 01:27:16.298: V/TAG(6304): onTouchEvent: false04-28 01:27:16.298: V/TAG(6304): Activity_dis: false
textView.setOnTouchListener(new OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub switch (event.getAction()) { case MotionEvent.ACTION_DOWN: Log.v("TAG", "TextView: ACTION_DOWN" + MotionEvent.ACTION_DOWN); break; case MotionEvent.ACTION_UP: Log.v("TAG", "TextView : ACTION_UP" + MotionEvent.ACTION_UP); break; default: break; } return true; //注意把这里改成true Textview才能监听到 TextView: ACTION_DOWN0及TextView : ACTION_UP1的动作。 04-28 01:36:26.057: V/TAG(6628): Activity_dis: ACTION_DOWN004-28 01:36:26.057: V/TAG(6628): TextView: ACTION_DOWN004-28 01:36:26.057: V/TAG(6628): Activity_dis: true04-28 01:36:26.148: V/TAG(6628): Activity_dis: ACTION_UP104-28 01:36:26.148: V/TAG(6628): TextView : ACTION_UP1//监听成功04-28 01:36:26.148: V/TAG(6628): Activity_dis: true
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