TextSwitcher的用法

 

public class MainActivity extends Activity implements ViewSwitcher.ViewFactory, View.OnClickListener{
    int count = 0;
    private TextSwitcher textSwitcher;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("文字转换器");

        Button button=(Button) findViewById(R.id.button1);
        textSwitcher=(TextSwitcher) findViewById(R.id.textSwitcher1);
        //指定转换器的viewSwitcher.viewFactory,提供转换所用的view
        textSwitcher.setFactory(this);
        //如果不用switcher.setFactory()方法设置转换时的View，也可以调用两次switcher.addView(view,index,params)；
        /*TextView textView1=new TextView(this);
        TextView textView2=new TextView(this);
        textSwitcher.addView(textView1, 0,new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
        textSwitcher.addView(textView2, 1,new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));*/
        //为view转换时设置动画（可选）
        Animation animation1=AnimationUtils.loadAnimation(getApplicationContext(), R.anim.anim1);
        Animation animation2=AnimationUtils.loadAnimation(getApplicationContext(), R.anim.anim2);
        textSwitcher.setInAnimation(animation1);
        textSwitcher.setOutAnimation(animation2);

        button.setOnClickListener(this);
        setCount();
    }
    //重写ViewSwitcher.ViewFactory的makeView方法，返回一个view作转换时用
    @Override
    public View makeView() {
        // TODO Auto-generated method stub
        TextView textView=new TextView(MainActivity.this);
        textView.setGravity(Gravity.TOP|Gravity.CENTER_HORIZONTAL);
        return textView;
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        count++;
        setCount();
    }
    private void setCount() {
        // TODO Auto-generated method stub
        textSwitcher.setText(String.valueOf(count));
    }
}