本文实例为大家分享了Android自定义textview实现跑马灯效果的具体代码，供大家参考，具体内容如下

xml布局

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/activity_main"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="myandroidstituds.test3.MainActivity">

android:layout_centerInParent="true"

android:layout_width="180dp"

android:layout_height="50dp">

android:padding="10dp"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="#55000000"

/>

android:id="@+id/mar"

android:layout_centerInParent="true"

android:layout_width="180dp"

android:layout_height="50dp">

android:id="@+id/tv1"

android:textSize="20sp"

android:gravity="center"

android:background="@android:color/transparent"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:textColor="#000000"

android:visibility="gone"

android:text="两个黄鹂鸣翠柳"

/>

android:id="@+id/tv2"

android:textSize="20sp"

android:background="@android:color/transparent"

android:gravity="center"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:textColor="#000000"

android:visibility="gone"

android:text="一行白鹭上青天"

/>

自定义MarqueeLayout

public class MarqueeLayout extends FrameLayout implements ViewTreeObserver.OnGlobalLayoutListener{

private View view1;

private View view2;

public int interval = 2000;

public MarqueeLayout(Context context) {

this(context,null);

}

public MarqueeLayout(Context context, AttributeSet attrs) {

this(context, attrs,0);

}

public MarqueeLayout(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

getViewTreeObserver().addOnGlobalLayoutListener(this);

}

@Override

protected void onFinishInflate() {

super.onFinishInflate();

if(getChildCount()!=2){

throw new IllegalArgumentException("MarqueeLayout should have 2 child!");

}

view1 = getChildAt(0);

view2 = getChildAt(1);

}

@Override

public void onGlobalLayout() {

getViewTreeObserver().removeGlobalOnLayoutListener(this);

view2.setTranslationY(view2.getHeight());

}

private Handler handler = new Handler(){

@Override

public void handleMessage(Message msg) {

super.handleMessage(msg);

startAnim();

}

};

boolean isAniming = false;

/**

* 开始滚动

*/

public void start(){

getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

@Override

public void onGlobalLayout() {

getViewTreeObserver().removeGlobalOnLayoutListener(this);

startAnim();

}

});

}

public void startAnim(){

if(isAniming)return;

isAniming = true;

int targetY1 = view1.getTranslationY()==0?-view1.getHeight():0;

int targetY2 = view2.getTranslationY()==0?-view2.getHeight():0;

ViewCompat.animate(view1)

.translationY(targetY1)

.setListener(new ViewPropertyAnimatorListenerAdapter(){

@Override

public void onAnimationEnd(View view) {

super.onAnimationEnd(view);

//移动到下方

resetView(view);

}

})

.setDuration(400).start();

ViewCompat.animate(view2)

.translationY(targetY2)

.setListener(new ViewPropertyAnimatorListenerAdapter(){

@Override

public void onAnimationEnd(View view) {

super.onAnimationEnd(view);

//移动到下方

resetView(view);

isAniming = false;

handler.sendEmptyMessageDelayed(0,interval);

}

})

.setDuration(400)

.start();

}

private void resetView(View view) {

if(view.getTranslationY()==-view.getHeight()){

view.setTranslationY(view.getHeight()*2);

}

}

public void stop(){

handler.removeCallbacksAndMessages(null);

}

}

在Activity中的使用

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

MarqueeLayout marqueeLayout = (MarqueeLayout) findViewById(R.id.mar);

TextView tv1 = (TextView) findViewById(R.id.tv1);

TextView tv2 = (TextView) findViewById(R.id.tv2);

marqueeLayout.start();

tv1.setVisibility(tv1.getTranslationY() == 0 ? View.VISIBLE : View.GONE);

tv2.setVisibility(tv2.getTranslationY() == 0 ? View.VISIBLE : View.GONE);

}

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。