简单实现Android滚动公告栏

publicclassMarqueeTextViewextendsLinearLayout {

 privateContext mContext;

 privateViewFlipper viewFlipper;

 privateView marqueeTextView;

 privateString[] textArrays;

 privateMarqueeTextViewClickListener marqueeTextViewClickListener;

 publicMarqueeTextView(Context context) {

 super(context);

 mContext = context;

 initBasicView();

 }

 publicMarqueeTextView(Context context, AttributeSet attrs) {

 super(context, attrs);

 mContext = context;

 initBasicView();

 }

 publicvoidsetTextArraysAndClickListener(String[] textArrays, MarqueeTextViewClickListener marqueeTextViewClickListener) {//1.设置数据源；2.设置监听回调（将textView点击事件传递到目标界面进行操作）

 this.textArrays = textArrays;

 this.marqueeTextViewClickListener = marqueeTextViewClickListener;

 initMarqueeTextView(textArrays, marqueeTextViewClickListener);

 }

 publicvoidinitBasicView() {//加载布局，初始化ViewFlipper组件及效果

 marqueeTextView = LayoutInflater.from(mContext).inflate(R.layout.marquee_textview_layout,null);

 LayoutParams layoutParams =newLinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);

 addView(marqueeTextView, layoutParams);

 viewFlipper = (ViewFlipper) marqueeTextView.findViewById(R.id.viewFlipper);

 viewFlipper.setInAnimation(AnimationUtils.loadAnimation(mContext, R.anim.slide_in_bottom));//设置上下的动画效果（自定义动画，所以改左右也很简单）

 viewFlipper.setOutAnimation(AnimationUtils.loadAnimation(mContext, R.anim.slide_out_top));

 viewFlipper.startFlipping();

 }

 publicvoidinitMarqueeTextView(String[] textArrays, MarqueeTextViewClickListener marqueeTextViewClickListener) {

 if(textArrays.length ==0) {

  return;

 }

 inti =0;

 viewFlipper.removeAllViews();

 while(i < textArrays.length) {

  TextView textView =newTextView(mContext);

  textView.setText(textArrays[i]);

  textView.setOnClickListener(marqueeTextViewClickListener);

  LayoutParams lp =newLinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);

  viewFlipper.addView(textView, lp);

  i++;

 }

 }

 publicvoidreleaseResources() {

 if(marqueeTextView !=null) {

  if(viewFlipper !=null) {

  viewFlipper.stopFlipping();

  viewFlipper.removeAllViews();

  viewFlipper =null;

  }

  marqueeTextView =null;

 }

 }

}

publicclassMainActivityextendsAppCompatActivity {

 privateMarqueeTextView marqueeTv;

 privateString [] textArrays =newString[]{"this is content No.1","this is content No.2","this is content No.3"};

 @Override

 protectedvoidonCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);

 setContentView(R.layout.activity_main);

 marqueeTv = (MarqueeTextView) findViewById(R.id.marqueeTv);

 marqueeTv.setTextArraysAndClickListener(textArrays,newMarqueeTextViewClickListener() {

  @Override

  publicvoidonClick(View view) {

  startActivity(newIntent(MainActivity.this,AnotherActivity.class));

  }

 });

 }

 @Override

 protectedvoidonDestroy() {

 marqueeTv.releaseResources();

 super.onDestroy();

 }

}