自定义PopupWindow轻松实现从底部弹出

1、首先，肯定要有动画资源吧，要不怎么弹嘞。啥都不管，先定义两个动画肯定用的着。

2、将上面两个动画加载到我们的PopupWindow上吧，可以在styles文件下定义

        @anim/push_bottom_in
        

        @anim/push_buttom_out
        

3、PopupWindow的布局

4、自定义所需的PopupWindow

public class CustomPopupWindow extends PopupWindow implements OnClickListener {    private Button btnTakePhoto, btnSelect, btnCancel;    private View mPopView;    private OnItemClickListener mListener;    public CustomPopupWindow(Context context) {        super(context);        // TODO Auto-generated constructor stub
        init(context);
        setPopupWindow();
        btnTakePhoto.setonClickListener(this);
        btnSelect.setonClickListener(this);
        btnCancel.setonClickListener(this);

}    
    private void init(Context context) {        // TODO Auto-generated method stub
        LayoutInflater inflater = LayoutInflater.from(context);        //绑定布局
        mPopView = inflater.inflate(R.layout.custom_popup_window, null);

        btnTakePhoto = (Button) mPopView.findViewById(R.id.id_btn_take_photo);
        btnSelect = (Button) mPopView.findViewById(R.id.id_btn_select);
        btnCancel = (Button) mPopView.findViewById(R.id.id_btn_cancelo);
    }    
    @SuppressLint("InlinedApi")    private void setPopupWindow() {        this.setContentView(mPopView);// 设置View
        this.setWidth(LayoutParams.MATCH_PARENT);// 设置弹出窗口的宽
        this.setHeight(LayoutParams.WRAP_CONTENT);// 设置弹出窗口的高
        this.setFocusable(true);// 设置弹出窗口可
        this.setAnimationStyle(R.style.mypopwindow_anim_style);// 设置动画
       this.setBackgroundDrawable(new ColorDrawable(0x00000000));// 设置背景透明
        mPopView.setonTouchListener(new onTouchListener() {// 如果触摸位置在窗口外面则销毁

            @Override
            public boolean onTouch(View v, MotionEvent event) {                // TODO Auto-generated method stub
                int height = mPopView.findViewById(R.id.id_pop_layout).getTop();                int y = (int) event.getY();                if (event.getAction() == MotionEvent.ACTION_UP) {                    if (y < height) {
                        dismiss();
                    }
                }                return true;
            }
        });
    }    
    public interface OnItemClickListener {        void setonItemClick(View v);
    }    public void setonItemClickListener(OnItemClickListener listener) {        this.mListener = listener;
    }    @Override
    public void onClick(View v) {        // TODO Auto-generated method stub
        if (mListener != null) {
            mListener.setonItemClick(v);
        }
    }

}

5、activity

public class MainActivity extends Activity implements OnItemClickListener{    private CustomPopupWindow mPop;    @Override
    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mPop=new CustomPopupWindow(this);
        mPop.setonItemClickListener(this);
        findViewById(R.id.id_start).setonClickListener(new View.onClickListener() {            @Override
            public void onClick(View v) {                //设置PopupWindow中的位置
                mPop.showAtLocation(MainActivity.this.findViewById(R.id.main), Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0);
            }
        });
    }    @Override
    public void setonItemClick(View v) {        // TODO Auto-generated method stub
        switch(v.getId()){        case R.id.id_btn_take_photo:
            Toast.makeText(getApplicationContext(), "拍照", Toast.LENGTH_LONG).show();            break;        case R.id.id_btn_select:
            Toast.makeText(getApplicationContext(),"从相册中选择", Toast.LENGTH_LONG).show();            break;        case R.id.id_btn_cancelo:
            mPop.dismiss();            break;
        }
   }
}

6、效果图

作者：涛涛123759
链接：https://www.jianshu.com/p/ae0c89452668