效果
手势拖动底部滑动上面，图二中拖动下拉
图二
Activity实现
package me.maxd.demo.activity;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.util.DisplayMetrics;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import me.maxd.demo.R;
/**
* 处理lin和手势拖动的实现 设置最小回退位置 最大回退位置 设置速度 手势速度
*/
public class TestActivity extends AppCompatActivity implements View.OnTouchListener, GestureDetector.OnGestureListener {
//滚动布局
LinearLayout show;
//滑动按钮
Button btn;
//动态改变布局用
private RelativeLayout.LayoutParams linearParams;
//配合ontouch使用，手势监听
private GestureDetector mGestureDetector;
int phone_high;//屏幕的高度
int stop_high;//需要停留的位置
int small_high = 260;//最小位置
int speed = 50;//自动展开或收回的滑动速率，默认为50，大小自己设，越大越快
//设定定时器用来自动弹回和弹出
Handler myHanlder = new Handler();
Runnable run = new Runnable() {
@SuppressLint("ClickableViewAccessibility")
@Override
public void run() {
//向上收回
if (stop_high == small_high) {
if (linearParams.height > stop_high) {
//速率自己调
linearParams.height = linearParams.height - speed;
show.setLayoutParams(linearParams); // 使设置好的布局参数应用到控件
// 递归
myHanlder.postDelayed(run, 1);
}
//向下展开
} else if (stop_high == phone_high) {
if (linearParams.height < stop_high) {
linearParams.height = linearParams.height + speed;
show.setLayoutParams(linearParams); // 使设置好的布局参数应用到控件
// 递归
myHanlder.postDelayed(run, 1);
}
}
}
};
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
show = (LinearLayout) findViewById(R.id.show);
btn = (Button) findViewById(R.id.btn);
// 取控件当前的布局参数
linearParams = (RelativeLayout.LayoutParams) show.getLayoutParams();
btn.setOnTouchListener(this);
mGestureDetector = new GestureDetector(this, this);
mGestureDetector.setIsLongpressEnabled(true);
//获取屏幕的高度
phone_high = getMetrics().heightPixels;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
//触摸返回值
int action = event.getAction();
float y = event.getY();
switch (action) {
//开始触摸
case MotionEvent.ACTION_DOWN:
//开始触摸时候返回的坐标
//取消计时器
myHanlder.removeCallbacks(run);
break;
//触摸移动
case MotionEvent.ACTION_MOVE:
//动态设定布局的高度为手势移动的高度
if (event.getRawY() >= small_high) {
linearParams.height = (int) event.getRawY();
show.setLayoutParams(linearParams);
}
break;
//终止触摸
case MotionEvent.ACTION_UP:
break;
}
return mGestureDetector.onTouchEvent(event);
}
//获取屏幕高度的方法
private DisplayMetrics getMetrics() {
WindowManager wm = getWindowManager();
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics;
}
//以下为手势监听,配合ontouch方法使用
//滑动的距离和速率。为了判断手势
final int FLING_MIN_DISTANCE = 10, FLING_MIN_VELOCITY = 100;
@Override
public boolean onDown(MotionEvent e) {
return false;
}
@Override
public void onShowPress(MotionEvent e) {
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
return false;
}
@Override
public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
return false;
}
@Override
public void onLongPress(MotionEvent e) {
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
//判断当滑动距离大于50并且速率大于200，即自动收回，向上滑动
if (e1.getRawY() - e2.getRawY() > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) {
//停止的高度为50，就是抽屉的最后的停留位置
stop_high = small_high;
myHanlder.post(run);
//判断当滑动距离小于50并且速率大于200，即自动展开，向下滑动
} else if (e1.getRawY() - e2.getRawY() < -FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) {
//停止的高度即屏幕高度，就是抽屉的最后的停留位置
stop_high = phone_high;
myHanlder.post(run);
}
return false;
}
}布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="@dimen/dp_400">
<LinearLayout
android:id="@+id/show"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/wifi_bg"
android:overScrollMode="never"
android:scrollbars="none">
<LinearLayout
android:id="@+id/info"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:visibility="gone"
android:id="@+id/test1"
android:layout_width="match_parent"
android:layout_height="@dimen/dp_80"
android:gravity="center"
android:textColor="#ffffff"
android:textSize="18sp" />
<TextView
android:visibility="gone"
android:id="@+id/test2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/dp_170"
android:gravity="center_horizontal"
android:scaleType="fitXY"
android:textColor="#ffffff"
android:textSize="18sp" />
</LinearLayout>
</LinearLayout>
<Button
android:id="@+id/btn"
android:layout_width="match_parent"
android:layout_height="@dimen/dp_60"
android:layout_alignBottom="@+id/show"
android:layout_alignParentStart="true"
android:background="@color/transparent" />
</RelativeLayout>图片
