Android 通过触摸更改屏幕背景色
我是Android开发新手,我的要求是当应用程序启动时,会显示一个空白屏幕。当用户滑动屏幕时,背景颜色应该改变 我不知道如何实现这一点。以下是我到目前为止的情况Android 通过触摸更改屏幕背景色,android,Android,我是Android开发新手,我的要求是当应用程序启动时,会显示一个空白屏幕。当用户滑动屏幕时,背景颜色应该改变 我不知道如何实现这一点。以下是我到目前为止的情况 import android.os.Bundle; import android.app.Activity; import android.graphics.Color; import android.view.GestureDetector; import android.view.GestureDet
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.Menu;
import android.view.MotionEvent;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MainActivity extends Activity implements OnGestureListener {
private LinearLayout main;
private TextView viewA;
private GestureDetector gestureScanner;
@Override
public boolean onTouchEvent(MotionEvent me) {
return gestureScanner.onTouchEvent(me);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public boolean onDown(MotionEvent e) {
viewA.setText("-" + "DOWN" + "-");
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
viewA.setText("-" + "FLING" + "-");
return true;
}
@Override
public void onLongPress(MotionEvent e) {
viewA.setText("-" + "LONG PRESS" + "-");
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
viewA.setText("-" + "SCROLL" + "-");
return true;
}
@Override
public void onShowPress(MotionEvent e) {
viewA.setText("-" + "SHOW PRESS" + "-");
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
viewA.setText("-" + "SINGLE TAP UP" + "-");
return true;
}
public LinearLayout getMain() {
return main;
}
public void setMain(LinearLayout main) {
this.main = main;
}
}
这可能有助于您在此处使用视图翻转器在一组图像视图之间翻转,在您的情况下,图像视图的高度和宽度将设置为填充父视图,其背景颜色将由您指定
`<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.50" >
<Button
android:id="@+id/btnPrev"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="< Prev" />
<Button
android:id="@+id/btnNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Next >" />
<ViewFlipper
android:id="@+id/viewFlipper1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toLeftOf="@+id/btnNext" >
<ImageView
android:layout_width="170dp"
android:layout_height="459dp"
android:layout_gravity="center_horizontal"
android:contentDescription="five"
android:src="@drawable/hair_five" />
<ImageView
android:layout_width="170dp"
android:layout_height="459dp"
android:layout_gravity="center_horizontal"
android:contentDescription="seven"
android:src="@drawable/hair_seven" />
<ImageView
android:layout_width="170dp"
android:layout_height="459dp"
android:contentDescription="one"
android:src="@drawable/hair_one" />
<ImageView
android:layout_width="170dp"
android:layout_height="459dp"
android:contentDescription="two"
android:src="@drawable/hair_two" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="170dp"
android:layout_height="459dp"
android:contentDescription="three"
android:src="@drawable/hair_three" />
<ImageView
android:layout_width="170dp"
android:layout_height="459dp"
android:contentDescription="four"
android:src="@drawable/hair_four" />
<ImageView
android:layout_width="170dp"
android:layout_height="459dp"
android:contentDescription="six"
android:src="@drawable/hair_six" />
</ViewFlipper>
</RelativeLayout>
`
`
您的代码将是:
public class FlipSlide extends Activity implements OnGestureListener{
GestureDetector gDetector;
protected void yourFlipperForward() {
// Set animation
tflipper.setAnimation(AnimationUtils.loadAnimation(
FlipSlide.this, android.R.anim.slide_in_left));
// Show next step
tflipper.showNext();
}
protected void yourFlipperBack() {
// Set animation
tflipper.setAnimation(AnimationUtils.loadAnimation(
FlipSlide.this, android.R.anim.slide_in_left));
// Show next step
tflipper.showPrevious();
}
private ViewFlipper tflipper;
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.flip_slide);
tflipper = (ViewFlipper) findViewById(R.id.viewFlipper1);
tflipper.startFlipping();
gDetector = new GestureDetector((OnGestureListener) this);
Button bp=(Button)findViewById(R.id.btnPrev);
bp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
flipPrevious( arg0);
}
});
Button bn=(Button)findViewById(R.id.btnNext);
bn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
flipNext( arg0);
}
});
}
public boolean onFling(MotionEvent start, MotionEvent finish, float xVelocity, float yVelocity) {
if (start.getRawY() < finish.getRawY()) {
yourFlipperForward();
} else {
yourFlipperBack();
}
return true;
}
@Override
public boolean onTouchEvent(MotionEvent me) {
return gDetector.onTouchEvent(me);
}
public void close(View v) {
finish();
}
public void flipNext(View v) {
yourFlipperForward();
}
public void flipPrevious(View v) {
yourFlipperBack();
}
@Override
public boolean onDown(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onLongPress(MotionEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
float arg3) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onShowPress(MotionEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public boolean onSingleTapUp(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}
}
公共类FlipSlide扩展活动在EstureListener上的实现{
手势检测器;
受保护的无效yourFlipperForward(){
//设置动画
tflipper.setAnimation(AnimationUtils.loadAnimation(
FlipSlide.this,android.R.anim.slide_in_左);
//显示下一步
tflipper.showNext();
}
受保护的无效FlipperBack(){
//设置动画
tflipper.setAnimation(AnimationUtils.loadAnimation(
FlipSlide.this,android.R.anim.slide_in_左);
//显示下一步
tflipper.showPrevious();
}
私有视图翻转器tflipper;
@抑制警告(“弃用”)
@凌驾
创建时受保护的空隙(捆绑冰柱){
超级冰柱;
setContentView(R.layout.flip_幻灯片);
tflipper=(ViewFlipper)findViewById(R.id.viewFlipper1);
tflipper.startFlipping();
gDetector=新的手势检测器((OnGetureListener)this);
按钮bp=(按钮)findViewById(R.id.btnPrev);
bp.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图arg0){
//TODO自动生成的方法存根
前向(arg0);
}
});
按钮bn=(按钮)findViewById(R.id.btnNext);
bn.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图arg0){
//TODO自动生成的方法存根
flipNext(arg0);
}
});
}
公共布尔onFling(MotionEvent开始、MotionEvent结束、浮点xVelocity、浮点yVelocity){
if(start.getRawY()
您的布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Shake to get a toast and to switch color" />
</LinearLayout>
现在,在你的onFling()中
使您的布局文件如下
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
然后重写onfling方法
@Override
public boolean onFling(MotionEvent start, MotionEvent finish,
float xVelocity, float yVelocity) {
ll.setBackground(yourDrawable);
}
希望它能工作…首先创建一个默认背景设置为黑色的布局(主布局)。现在,在you onFling()方法中,将背景颜色更改为您想要的任何颜色我可以怎么做,我希望您能帮助我创建此:android:background=“#000000”我将此作为答案发布,请查看谢谢:)我不会使用图像来更改背景,没有图像我怎么做。改用布局,它将是相同的
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
public class MainActivityextends Activity implements android.gesture.GestureOverlayView.OnGestureListener {
GestureDetector gd;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.image);
gd= new GestureDetector((OnGestureListener) ImageEditing.this);
LinearLayout layout = (LinearLayout)findViewById(R.id.ll_main);
layout.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return true;
}
});
}
}
@Override
public boolean onFling(MotionEvent start, MotionEvent finish,
float xVelocity, float yVelocity) {
ll.setBackground(yourDrawable);
}