Android编程实现仿QQ发表说说，上传照片及弹出框效果【附demo源码下载】

public class MainActivity extends Activity {  //添加数据按钮  private ImageView addDataIv;  //下拉功能菜单  private LinearLayout dropDownView;  private View bgView;  //当前下拉菜单是否为显示状态  private boolean showItems = false;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    addDataIv = (ImageView) findViewById(R.id.main_newData);    dropDownView = (LinearLayout) findViewById(R.id.dropDownView);    bgView = findViewById(R.id.main_bg);    addDataIv.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        if (!showItems) {          showView();        } else {          dismissView();        }      }    });    //点击空白隐藏弹出框    bgView.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        if (showItems) {          dismissView();        }      }    });    //下拉功能菜单上按钮的点击事件    View.OnClickListener l = new OnClickImpl();    findViewById(R.id.dropDown_item1).setOnClickListener(l);    findViewById(R.id.dropDown_item2).setOnClickListener(l);    findViewById(R.id.dropDown_item3).setOnClickListener(l);    findViewById(R.id.dropDown_item4).setOnClickListener(l);  }  //显示下拉菜单  private void showView() {    showItems = true;    addDataIv.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.rotate_open));    dropDownView.startAnimation(AnimationUtils.loadAnimation(this, R.anim.drop_down));    dropDownView.setVisibility(View.VISIBLE);    bgView.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_dark));    bgView.setVisibility(View.VISIBLE);  }  //隐藏下拉菜单  private void dismissView() {    showItems = false;    addDataIv.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.rotate_close));    Animation dropUpAnim = AnimationUtils.loadAnimation(this, R.anim.drop_up);    dropUpAnim.setAnimationListener(new AnimListenerImpl(dropDownView));    dropDownView.startAnimation(dropUpAnim);    dropDownView.setVisibility(View.INVISIBLE);    Animation fadeLightAnim = AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_light);    fadeLightAnim.setAnimationListener(new AnimListenerImpl(bgView));    bgView.startAnimation(fadeLightAnim);    bgView.setVisibility(View.INVISIBLE);  }  //点击返回键时，如果下拉菜单是显示状态，则隐藏它  @Override  public void onBackPressed() {    if (showItems) {      dismissView();      return;    }    super.onBackPressed();  }  private class OnClickImpl implements View.OnClickListener {    @Override    public void onClick(View v) {      if (!showItems) {        return;      }      int id = v.getId();      switch (id) {        case R.id.dropDown_item1:          Toast.makeText(MainActivity.this, "item1 onClick", Toast.LENGTH_SHORT).show();          dismissView();          break;        case R.id.dropDown_item2:          Toast.makeText(MainActivity.this, "item2 onClick", Toast.LENGTH_SHORT).show();          dismissView();          break;        case R.id.dropDown_item3:          Toast.makeText(MainActivity.this, "item3 onClick", Toast.LENGTH_SHORT).show();          dismissView();          break;        case R.id.dropDown_item4:          Toast.makeText(MainActivity.this, "item4 onClick", Toast.LENGTH_SHORT).show();          dismissView();          break;        default:          break;      }    }  }  //动画结束后必须clearAnimation，否则隐藏状态的view依然能响应点击事件  private class AnimListenerImpl implements Animation.AnimationListener {    private View view;    public AnimListenerImpl(View view) {      this.view = view;    }    @Override    public void onAnimationStart(Animation animation) {    }    @Override    public void onAnimationEnd(Animation animation) {      view.clearAnimation();    }    @Override    public void onAnimationRepeat(Animation animation) {    }  }}