仿QQ的tab滑动的代码代码,Java代码库,德仔网

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【Java】仿QQ的tab滑动的代码
作者:黄弘玄 / 发布于2013/10/11/ 619

	public class MainActivity extends ActivityGroup {

	 private RelativeLayout layout;
	
	 private RelativeLayout layout1;
	 private RelativeLayout layout2;
	 private RelativeLayout layout3;
	
	 private RelativeLayout bodylayout;
	
	 private ImageView tab1;
	 private ImageView tab2;
	 private ImageView tab3;
	
	 private ImageView first;
	 private int current = 1; //默认选中第一个，可以动态的改变此参数值
	
	 public void onCreate(Bundle savedInstanceState) {
	 super.onCreate(savedInstanceState);
	 setContentView(R.layout.main);
	 initUI();
	 }
	
	 private void initUI(){
	 layout = (RelativeLayout) findViewById(R.id.root);
	
	 layout1 = (RelativeLayout) findViewById(R.id.layout1);
	 layout2 = (RelativeLayout) findViewById(R.id.layout2);
	 layout3 = (RelativeLayout) findViewById(R.id.layout3);
	 bodylayout = (RelativeLayout) findViewById(R.id.bodylayout);
	
	 tab1 = (ImageView) findViewById(R.id.tab1);
	 tab1.setOnClickListener(onClickListener);
	 tab2 = (ImageView) findViewById(R.id.tab2);
	 tab2.setOnClickListener(onClickListener);
	 tab3 = (ImageView) findViewById(R.id.tab3);
	 tab3.setOnClickListener(onClickListener);
	
	 RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
	 rl.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);
	 first = new ImageView(this);
	 first.setTag("first");
	 first.setImageResource(R.drawable.topbar_select);
	
	 // 默认选中项
	 switch (current) {
	 case 1:
	 layout1.addView(first, rl);
	 current = R.id.tab1;
	 break;
	 case 2:
	 layout2.addView(first, rl);
	 current = R.id.tab2;
	 break;
	 case 3:
	 layout3.addView(first, rl);
	 current = R.id.tab3;
	 break;
	 default:
	 break;
	 }
	 View view = getLocalActivityManager().startActivity("index",
	 new Intent(MainActivity.this, Tab1.class))
	 .getDecorView();
	 bodylayout.addView(view);
	
	 }

	 private boolean isAdd = false; // 是否添加过 top_select
	 private int select_width; // top_select_width
	 private int select_height; // top_select_height
	 private int firstLeft; // 第一次添加后的左边距*****
	 private int startLeft; // 起始左边距
	
	 // 添加一个view，移除一个view
	 private void replace() {
	 switch (current) {
	 case R.id.tab1:
	 changeTop(layout1);
	 break;
	 case R.id.tab2:
	 changeTop(layout2);
	 break;
	 case R.id.tab3:
	 changeTop(layout3);
	 break;
	 default:
	 break;
	 }
	 }
	
	 private void changeTop(RelativeLayout relativeLayout){
	 ImageView old = (ImageView) relativeLayout.findViewWithTag("first");;
	 select_width = old.getWidth();
	 select_height = old.getHeight();
	
	 RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(select_width, select_height);
	 rl.leftMargin = old.getLeft() + ((RelativeLayout)old.getParent()).getLeft();
	 rl.topMargin = old.getTop() + ((RelativeLayout)old.getParent()).getTop();
	
	 // 获取起始位置
	 firstLeft = old.getLeft() + ((RelativeLayout)old.getParent()).getLeft();
	
	 ImageView iv = new ImageView(this);
	 iv.setTag("move");
	 iv.setImageResource(R.drawable.topbar_select);
	
	 layout.addView(iv , rl);
	 relativeLayout.removeView(old);
	 }
	
	 private OnClickListener onClickListener = new OnClickListener(){
	 public void onClick(View v) {
	 if(!isAdd){
	 replace(); // 初次使用移除old 添加新的top_select为RelativeLayout所使用
	 isAdd = true;
	 }
	
	 ImageView top_select = (ImageView) layout.findViewWithTag("move");
	 int tabLeft;
	 int endLeft = 0;
	
	 boolean run = false;

	 switch (v.getId()) {
	 case R.id.tab1:
	 if (current != R.id.tab1) {
	 // 中心位置
	 tabLeft = ((RelativeLayout) tab1.getParent()).getLeft() + tab1.getLeft() + tab1.getWidth() / 2;
	 // 最终位置
	 endLeft = tabLeft - select_width / 2;
	 current = R.id.tab1;
	 run = true;
	 bodylayout.removeAllViews();
	 View view = getLocalActivityManager().startActivity("index",
	 new Intent(MainActivity.this, Tab1.class))
	 .getDecorView();
	 bodylayout.addView(view);
	 }
	 break;
	 case R.id.tab2:
	 if (current != R.id.tab2) {
	 tabLeft = ((RelativeLayout) tab2.getParent()).getLeft() + tab2.getLeft() + tab2.getWidth() / 2;
	 endLeft = tabLeft - select_width / 2;
	 current = R.id.tab2;
	 run = true;
	 bodylayout.removeAllViews();
	 View view = getLocalActivityManager().startActivity("index",
	 new Intent(MainActivity.this, Tab2.class))
	 .getDecorView();
	 bodylayout.addView(view);
	 }
	 break;
	 case R.id.tab3:
	 if (current != R.id.tab3) {
	 tabLeft = ((RelativeLayout) tab3.getParent()).getLeft() + tab3.getLeft() + tab3.getWidth() / 2;
	 endLeft = tabLeft - select_width/2;
	 current = R.id.tab3;
	 run = true;
	 bodylayout.removeAllViews();
	 View view = getLocalActivityManager().startActivity("index",
	 new Intent(MainActivity.this, Tab3.class))
	 .getDecorView();
	 bodylayout.addView(view);
	 }
	 break;
	 default:
	 break;
	 }
	
	 if(run){
	 TranslateAnimation animation = new TranslateAnimation(startLeft, endLeft - firstLeft, 0, 0);
	 startLeft = endLeft - firstLeft; // 重新设定起始位置
	 animation.setDuration(400);
	 animation.setFillAfter(true);
	 top_select.bringToFront();
	 top_select.startAnimation(animation);
	 }
	
	 }

	 };

	}
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