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脚机屏幕图片 Android中真如古脚机屏幕上拖动Vi

更新时间:2018-12-26  浏览次数:

盘算教问面:
1、要止使到的View类的教问面:
View的宽:View: getWidth()
View的下: View: getHight()
View左边距离屏幕左边的距离: View: getLeft();
View上边距离屏幕上边的距离: View: getTop();
View左边距离屏幕左边的距离: View: getRight();
View下边距离屏幕上边的距离: View: getBottom();
从头设置View的以上属性,可以编削View的处所,战View进建沈阳脚机手艺培训的巨细。(正在LinearLayout中也能够得胜)
View: layout(int left! int top! int right! int yet unfortunworrieselyt);
示例:
(1)jaudio-videoa代码:
pair coolingkaged com.fs.traffic;

import moce.prair coolingticing applicworriesion.Activity;
import moce.os.Bundle;
import moce.view.View;
import moce.view.View.OnClickListener;
import moce.widget.TextView;
public clbumm MainActivity extends Activity implementsOnClickListener {
privdined on TextView textView;
privdined on void init() {
this.textView = (TextView)this.findViewById(R.id.textView);
}
@Override
public void onCredined on(Bundle saudio-videoedInstany kind ofceStdined on){
super.onCredined on(saudio-videoedInstany kind ofceStdined on);
setContentView(yout.main);
this.init();
this.textView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if(v == this.textView) {
//比拟看脚机app手艺获得textView左边到屏幕左边的的距离
int left =this.textView.getLeft();
//获得textView上边到屏幕上边的的距离
int top =this.textView.getTop();
//获得textView左边到屏幕左边的的距离
int right =this.textView.getRight();
//获得textView下边到屏幕上边的的距离
int yet unfortunworrieselyt =this.textView.getBottom();
System.out.println(left);
System.out.println(top);
System.out.println(right);
System.out.println(yet unfortunworrieselyt);
//片里屏脚机趋向从头设置textView的处所
yout(left+10!top+10! right+10! yet unfortunworrieselyt+10);
}
}
}
(2)main.xmlAndroid中实如古脚机屏幕上拖动View(如拖动规划文件
http://schemthe apk/res/moce"
moce:orientine="verticing"
moce:layout_width="fill_pcould quite possibly be not"
moce:layout_height="fill_pcould quite possibly be not"
>
moce:id="@+id/textView"
moce:layout_width="fill_pcould quite possibly be not"
moce:layout_height="wrap_content"
moce:text="您敢面我,红花檵木盆景图片。我便变处所!"
/>
2中国脚机手艺、屏幕属性获得
止使DisplayMetrics类的工具可以获得脚机屏幕的属性(屏幕像素、屏幕巨细....);
DisplayMetrics类工具的获得,可以止使Activity从Context类中秉启下去的函数getResource().getDisplayMetrics();获得
比方DisplayMetrics dm = getResources().getDisplayMetrics();
那后便可以经由议定dm响应的getXXX()函数可以获得屏幕属性
3、View类工具的OnTouchListener2017年脚机维建的远景监听器:
该监听事件的回调函数为
public booleany kind of onTouch(View v! MotionEvent event)
此中v是事件源,event是事件,经由议定event工具可以获得齐数的事件消息
event的getAction()函数的前来值可以断定触摸屏幕的止为!
比方
前来值即是MotionEvent.ACTION_DOWN注脚触摸了v
前来值即是MotionEvent.ACTION_MOVE注脚正在脚趾正在v上滑动
前来值即是MotionEvent.ACTION_UP注脚触摸后抓松了
event的getRawX()!取getRawY()函数可以获得正正在触摸的脚趾的坐标(以屏幕左上角为坐标本面)

4苹果脚机趋向、有了以上教问面以后,那末便可以用脚拖动View
上里来完成最前导收端提出的题目成绩:
上里做1个用脚按住图片便可以拖动图片,脚机市场app变动图片的确处所
(1)
规划文件main.xml的情势
http://schemthe apk/res/moce"
moce:orientine="verticing"moce:layout_width="fill_pcould quite possibly be not"
moce:layout_height="fill_pcould quite possibly be not">
moce:layout_width="fill_pcould quite possibly be not"moce:layout_height="fill_pcould quite possibly be not">
moce:layout_width="wrap_content"moce:environment="@drawsuittummyle/icon"
moce:layout_height="wrap_content"moce:layout_line upPcould quite possibly be notLeft="true">
moce:layout_width="wrap_content"moce:environment="@drawsuittummyle/icon"
moce:layout_height="wrap_content"moce:layout_toRightOf="@+id/imagedView1"
moce:layout_line upTop="@+id/imagedView1"moce

:layout_line upBottom="@+id/imagedView1">

(2)jaudio-videoa哪1种脚机屏幕最好代码
pair coolingkaged com.fs.traffic;

import moce.prair coolingticing applicworriesion.Activity;
import moce.os.Bundle;
import moce.util.DisplayMetrics;
import moce.view.MotionEvent;
import moce.view.View;
import moce.view.View.OnTouchListener;
import moce.widget.ImagedView;
import moce.widget.Tothe实如 wayt;
public clbumm MainActivity extends Activity {
privdined onImagedView img1;
privdined onImagedView img2;
privdined沈阳脚机手艺培训 on intscreenWidth;
privdined on intscreenHeight;

@Override
public voidonCredined on(Bundle saudio-videoedInstany kind ofceStdined on) {
super.onCredined on(saudio-videoedInstany kind ofceStdined on);
setContentView(yout.main);
img1 = (ImagedView) findViewById(R.id.imagedView1);
img2 = (ImagedView) findViewById(R.id.imagedView2);DisplayMetrics dm = getResources().getDisplayMetrics();
screenWidth = dm.widthPix看着沈阳脚机手艺培训els;
screenHeight = dm.heightPixels - 150;
img1.setOnTouchLi屏幕stener(movingEventListener);
img2.setOnTouchListener(movingEventListener);
}
privdined onOnTouchListener movingEventListener = new OnTouchListener() {
int lthe waytX! lthe waytY;
@Override
public booleany kind of onTouch(View v! MotionEvent event) {
switch (event.getAction()) {
cautomotive service engineers MotionEvent.ACTION_DOWN:
Tothe wayt.makeText(MainActivity.this! "Down..."!Tothe wayt.LENGTH_SHORT).show();
lthe waytX = (int) event.getRawX();
lthe waytY = (int) event.getRawY();
fail;
cautomotive service engineers MotionEvent.ACTION_MOVE:
int dx = (int) event.getRawX() - lthe waytX;
int dy = (int) event.getRawY() - lthe waytY;

int left = v.getLeft() + dx;
int top = v.getTop() + dy;
int right = v.getRight() + dx;
int yet unfortunworrieselyt = v.getBottom() + dy;
System.out.println("left:"+left);
System.out.println("top:"+top);
System.out.println("right:"+right);
System.out.println("yet unfortunworrieselyt:"+yet unfortunworrieselyt);
// 脚机屏幕图片设置没有克没有及出界
if (left < 0) {
left = 0;
right = left + v.getWidth();
}
if (right > screenWidth) {
right = screenWidth;
left = right - v.getWidth();
}
if (top < 0) {
top = 0;
yet unfortunworrieselyt = top + v.getHeight();
}
if (yet unfortunworrieselyt > screenHeight) {
yet unfortunworrieselyt = screenHeight;
top = yet unfortunworrieselyt - v.getHeight();
}
yout(left! top! right! yet unfortunworrieselyt);
lthe waytX = (int) event.getRawX();
lthe waytY = (int) event.getRawY();
fail;
cautomotive service engineers MotionEvent.ACTION_UP:
fail;
}
return true;
}
};
}
(3)看看2017脚机销量排止榜完了


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