Android开发-自定义View-AndroidStudio(九)手势监听类GestureDetector

转载请注明出处：http://blog.csdn.net/iwanghang/
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由于我自己对手势监听类没什么概念，用过很多次，但是没有完整的了解过，找了一个Demo加以改进，帮助大家一起理解。
老规矩，先上GIF动态图，看个效果，如果符合你的项目或者确定你要了解的内容，再往下看吧：



MainActivity.java：

package com.iwanghang.mygesturedetector;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.View;
import android.widget.Button;
import android.util.Log;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View.OnTouchListener;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

private TextView textView,tv_1,tv_2,tv_3,tv_4,tv_5;
private Integer tv_times_now;
private Integer tv_times = 0;
private Button mButton;
private GestureDetector mGestureDetector;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

tv_1 = (TextView) findViewById(R.id.tv_1);
tv_2 = (TextView) findViewById(R.id.tv_2);
tv_3 = (TextView) findViewById(R.id.tv_3);
tv_4 = (TextView) findViewById(R.id.tv_4);
tv_5 = (TextView) findViewById(R.id.tv_5);

mGestureDetector = new GestureDetector(this, new MyOnGestureListener());

mButton = (Button) findViewById(R.id.btn_textgesture);
mButton.setOnTouchListener(new OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {
Log.i(getClass().getName(), "onTouch-----" + getActionName(event.getAction()));
tv_times_get();
textView.setText("onTouch-----" + getActionName(event.getAction()));
mGestureDetector.onTouchEvent(event);
// 一定要返回true，不然获取不到完整的事件
return true;
}
});
}

public void Clean(View view){
tv_1.setText("");
tv_2.setText("");
tv_3.setText("");
tv_4.setText("");
tv_5.setText("");
}

private void tv_times_get() {
tv_times_now = tv_times % 5;
switch (tv_times_now){
case 0:
textView = tv_1;
break;
case 1:
textView = tv_2;
break;
case 2:
textView = tv_3;
break;
case 3:
textView = tv_4;
break;
case 4:
textView = tv_5;
break;
}
tv_times = tv_times + 1;
}

private String getActionName(int action) {
String name = "";
switch (action) {
case MotionEvent.ACTION_DOWN: {
name = "ACTION_DOWN";
break;
}
case MotionEvent.ACTION_MOVE: {
name = "ACTION_MOVE";
break;
}
case MotionEvent.ACTION_UP: {
name = "ACTION_UP";
break;
}
default:
break;
}
return name;
}

class MyOnGestureListener extends SimpleOnGestureListener {
@Override
public boolean onSingleTapUp(MotionEvent e) {
Log.i(getClass().getName(), "onSingleTapUp-----" + getActionName(e.getAction()));
tv_times_get();
textView.setText("onSingleTapUp-----" + getActionName(e.getAction()));
return false;
}

@Override
public void onLongPress(MotionEvent e) {
Log.i(getClass().getName(), "onLongPress-----" + getActionName(e.getAction()));
tv_times_get();
textView.setText("onLongPress-----" + getActionName(e.getAction()));
}

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
Log.i(getClass().getName(), "onScroll-----" + getActionName(e2.getAction()) + ",(" + e1.
getX() + "," + e1.getY() + ") ,(" + e2.getX() + "," + e2.getY() + ")");
tv_times_get();
textView.setText( "onScroll-----" + getActionName(e2.getAction()) + ",(" + e1.getX() +
"," + e1.getY() + ") ,(" + e2.getX() + "," + e2.getY() + ")");
return false;
}

@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
Log.i(getClass().getName(), "onFling-----" + getActionName(e2.getAction()) + ",(" + e1.
getX() + "," + e1.getY() + ") ,(" + e2.getX() + "," + e2.getY() + ")");
tv_times_get();
textView.setText( "onFling-----" + getActionName(e2.getAction()) + ",(" + e1.getX() +
"," + e1.getY() + ") ,(" + e2.getX() + "," + e2.getY() + ")");
return false;
}

@Override
public void onShowPress(MotionEvent e) {
Log.i(getClass().getName(), "onShowPress-----" + getActionName(e.getAction()));
tv_times_get();
textView.setText("onShowPress-----" + getActionName(e.getAction()));
}

@Override
public boolean onDown(MotionEvent e) {
Log.i(getClass().getName(), "onDown-----" + getActionName(e.getAction()));
tv_times_get();
textView.setText("onDown-----" + getActionName(e.getAction()));
return false;
}

@Override
public boolean onDoubleTap(MotionEvent e) {
Log.i(getClass().getName(), "onDoubleTap-----" + getActionName(e.getAction()));
tv_times_get();
textView.setText("onDoubleTap-----" + getActionName(e.getAction()));
return false;
}

@Override
public boolean onDoubleTapEvent(MotionEvent e) {
Log.i(getClass().getName(), "onDoubleTapEvent-----" + getActionName(e.getAction()));
tv_times_get();
textView.setText("onDoubleTapEvent-----" + getActionName(e.getAction()));
return false;
}

@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
Log.i(getClass().getName(), "onSingleTapConfirmed-----" + getActionName(e.getAction()));
tv_times_get();
textView.setText("onSingleTapConfirmed-----" + getActionName(e.getAction()));
return false;
}
}

}

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.iwanghang.mygesturedetector.MainActivity">

<Button
android:text="清除"
android:onClick="Clean"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/tv_1"
android:textColor="#ff0000"
android:text="@string/app_name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<!--我是分割-->
<ImageView
android:layout_width="fill_parent"
android:layout_height="0.1dp"
android:background="#000000" />

<TextView
android:id="@+id/tv_2"
android:textColor="#ff0000"
android:text="@string/app_name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<!--我是分割-->
<ImageView
android:layout_width="fill_parent"
android:layout_height="0.1dp"
android:background="#000000" />

<TextView
android:id="@+id/tv_3"
android:textColor="#ff0000"
android:text="@string/app_name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<!--我是分割-->
<ImageView
android:layout_width="fill_parent"
android:layout_height="0.1dp"
android:background="#000000" />

<TextView
android:id="@+id/tv_4"
android:textColor="#ff0000"
android:text="@string/app_name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<!--我是分割-->
<ImageView
android:layout_width="fill_parent"
android:layout_height="0.1dp"
android:background="#000000" />

<TextView
android:id="@+id/tv_5"
android:textColor="#ff0000"
android:text="@string/app_name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/btn_textgesture"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="@string/app_name" />

</LinearLayout>

转载请注明出处：http://blog.csdn.net/iwanghang/

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