单击按钮时，图像连续移动到底和底部至顶部

Question

我有一个映像和一个按钮，当我单击按钮时，图像是连续移动的，底部到底到顶部的，直到我单击停止按钮，但是当我单击"启动"按钮时，它会移动仅底部到上或底部，它的两侧不连续移动。

我的代码是：

 public class MainActivity extends Activity {
RelativeLayout rl_footer;
ImageView iv_header;
boolean isBottom = true;
Button btn1;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    rl_footer = (RelativeLayout) findViewById(R.id.rl_footer);
    iv_header = (ImageView) findViewById(R.id.iv_up_arrow);
    Button button=(Button)findViewById(R.id.button1);
    button.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            iv_header.setImageResource(R.drawable.download);
            iv_header.setPadding(0, 10, 0, 0); 
            //rl_footer.setBackgroundResource(R.drawable.download);
            if (isBottom) {
                SlideToAbove();
                isBottom = false;
            } else {
                iv_header.setImageResource(R.drawable.download);
                iv_header.setPadding(0, 0, 0,50);
                //rl_footer.setBackgroundResource(R.drawable.download);
                SlideToDown();
                isBottom = true;
            }
        }
    });
}
public void SlideToAbove() {
    Animation slide = null;
    slide = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f,
            Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
            0.0f, Animation.RELATIVE_TO_SELF, -5.0f);
    slide.setDuration(400);
    slide.setFillAfter(true);
    slide.setFillEnabled(true);
    rl_footer.startAnimation(slide);
    slide.setAnimationListener(new AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {
        }
        @Override
        public void onAnimationRepeat(Animation animation) {
        }
        @Override
        public void onAnimationEnd(Animation animation) {
            rl_footer.clearAnimation();
            RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
                    rl_footer.getWidth(), rl_footer.getHeight());
            // lp.setMargins(0, 0, 0, 0);
            lp.addRule(RelativeLayout.ALIGN_PARENT_TOP);
            rl_footer.setLayoutParams(lp);
        }
    });
}
public void SlideToDown() {
    Animation slide = null;
    slide = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f,
            Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
            0.0f, Animation.RELATIVE_TO_SELF, 5.2f);
    slide.setDuration(400);
    slide.setFillAfter(true);
    slide.setFillEnabled(true);
    rl_footer.startAnimation(slide);
    slide.setAnimationListener(new AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {
        }
        @Override
        public void onAnimationRepeat(Animation animation) {
        }
        @Override
        public void onAnimationEnd(Animation animation) {
            rl_footer.clearAnimation();
            RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
                    rl_footer.getWidth(), rl_footer.getHeight());
            lp.setMargins(0, rl_footer.getWidth(), 0, 0);
            lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
            rl_footer.setLayoutParams(lp);
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
   }

XML代码：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/rl_main"
android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="@drawable/graphics" >
 <RelativeLayout
android:id="@+id/rl_footer"
android:layout_width="fill_parent"
android:layout_height="70dp"
android:layout_alignParentBottom="true">
<ImageView
    android:id="@+id/iv_up_arrow"
    android:layout_width="45dp"
    android:layout_height="45dp"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:paddingBottom="10dp"
    android:src="@drawable/download" />
  </RelativeLayout>
  <Button
 android:id="@+id/button1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignLeft="@+id/rl_footer"
 android:layout_alignParentTop="true"
 android:text="start" />
<Button
 android:id="@+id/button2"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignLeft="@+id/rl_footer"
 android:layout_alignParentTop="true"
 android:text="stop" />
 </RelativeLayout>

Answer 1

在下面的代码下方试用它的动画正常工作，并且它可以连续地从底部到顶部和底部移动。并在单击停止按钮时停止动画。

我做了一些相关的更改，您可以通过代码验证这些更改。

public class MainActivity extends Activity {
    RelativeLayout rl_footer;
    ImageView iv_header;
    boolean isBottom = true;
    Button btn1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        rl_footer = (RelativeLayout) findViewById(R.id.rl_footer);
        iv_header = (ImageView) findViewById(R.id.iv_up_arrow);
        Button button = (Button) findViewById(R.id.button1);
        Button buttonstop = (Button) findViewById(R.id.button2);
        buttonstop.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                rl_footer.clearAnimation();
                rl_footer.removeAllViews();
            }
        });
        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                iv_header.setImageResource(R.drawable.delete);
                iv_header.setPadding(0, 10, 0, 0);
                // rl_footer.setBackgroundResource(R.drawable.download);
                // if (isBottom) {
                SlideToAbove();
                // isBottom = false;
                // } else {
                // iv_header.setImageResource(R.drawable.delete);
                // iv_header.setPadding(0, 0, 0,50);
                // rl_footer.setBackgroundResource(R.drawable.download);
                // SlideToDown();
                // isBottom = true;
                // }
            }
        });
    }
    public void SlideToAbove() {
        Animation slide = null;
        slide = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f,
                Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
                0.0f, Animation.RELATIVE_TO_SELF, -5.0f);
        slide.setDuration(400);
        slide.setFillAfter(true);
        slide.setFillEnabled(true);
        rl_footer.startAnimation(slide);
        slide.setAnimationListener(new AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
            }
            @Override
            public void onAnimationRepeat(Animation animation) {
            }
            @Override
            public void onAnimationEnd(Animation animation) {
//              rl_footer.clearAnimation();
                RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
                        rl_footer.getWidth(), rl_footer.getHeight());
                // lp.setMargins(0, 0, 0, 0);
                lp.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                rl_footer.setLayoutParams(lp);
                iv_header.setImageResource(R.drawable.delete);
                iv_header.setPadding(0, 0, 0, 50);
                SlideToDown();
            }
        });
    }
    public void SlideToDown() {
        Animation slide = null;
        slide = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f,
                Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
                0.0f, Animation.RELATIVE_TO_SELF, 5.2f);
        slide.setDuration(400);
        slide.setFillAfter(true);
        slide.setFillEnabled(true);
        rl_footer.startAnimation(slide);
        slide.setAnimationListener(new AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
            }
            @Override
            public void onAnimationRepeat(Animation animation) {
            }
            @Override
            public void onAnimationEnd(Animation animation) {
//              rl_footer.clearAnimation();
                RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
                        rl_footer.getWidth(), rl_footer.getHeight());
                lp.setMargins(0, rl_footer.getWidth(), 0, 0);
                lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                rl_footer.setLayoutParams(lp);
                iv_header.setImageResource(R.drawable.delete);
                iv_header.setPadding(0, 10, 0, 0);
                SlideToAbove();
            }
        });
    }
}

布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rl_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <RelativeLayout
        android:id="@+id/rl_footer"
        android:layout_width="fill_parent"
        android:layout_height="70dp"
        android:layout_alignParentBottom="true" >
        <ImageView
            android:id="@+id/iv_up_arrow"
            android:layout_width="45dp"
            android:layout_height="45dp"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:paddingBottom="10dp"
            android:src="@drawable/ic_launcher" />
    </RelativeLayout>
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/rl_footer"
        android:layout_alignParentTop="true"
        android:text="start" />
    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="84dp"
        android:text="stop" />
</RelativeLayout>

Answer 2

请用第二个按钮删除属性android:layout_alignParentTop="true"，然后将其放在顶部的按钮下方。检查是否解决了您的问题。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rl_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/rl_footer"
    android:layout_alignParentTop="true"
    android:text="start" />
<RelativeLayout
    android:id="@+id/rl_footer"
    android:layout_width="fill_parent"
    android:layout_height="70dp"
    android:layout_alignParentBottom="true" >
    <ImageView
        android:id="@+id/iv_up_arrow"
        android:layout_width="45dp"
        android:layout_height="45dp"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:paddingBottom="10dp"
        android:src="your drawable" />
</RelativeLayout>
<Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/rl_footer"
    android:layout_below="@id/button1" // Change here
    android:text="stop" />