我一直在开发一个 android 应用程序，我需要在其中实现聊天头功能。我已经能够创建聊天头，但无法找到一种方法来添加长按并拖动图标时出现的十字按钮。 我想知道的是那个十字图标是什么，以及如何通过拖放将其覆盖在现有屏幕上，就像聊天头本身一样。 那是另一个聊天头还是别的什么？

最佳答案

mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);

//获取屏幕尺寸以决定您要拖动和移除气泡的区域。

    Display display = mWindowManager.getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);
        screenWidth = size.x;
        screenHeight = size.y;

        LayoutInflater inflater = LayoutInflater.from(this);
        mChatHead = inflater.inflate(R.layout.chatheaddemo, null);
        mChatHeadImageView = (ImageView) mChatHead
                .findViewById(R.id.chathead_imageview);
        mChatHeadTextView = (TextView) mChatHead
                .findViewById(R.id.chathead_textview);
        mLayout = (LinearLayout) mChatHead
                .findViewById(R.id.chathead_linearlayout);


        final WindowManager.LayoutParams parameters = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT, 
                WindowManager.LayoutParams.WRAP_CONTENT, 
                WindowManager.LayoutParams.TYPE_PHONE, 
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, 
                PixelFormat.TRANSLUCENT 
        );

        parameters.x = 0;
        parameters.y = 50;
        parameters.gravity = Gravity.TOP | Gravity.LEFT;

        // Drag support!
        mChatHeadImageView.setOnTouchListener(new OnTouchListener() {

            int initialX, initialY;
            float initialTouchX, initialTouchY;

            @Override
            public boolean onTouch(View v, MotionEvent event) {

                switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    initialX = parameters.x;
                    initialY = parameters.y;
                    initialTouchX = event.getRawX();
                    initialTouchY = event.getRawY();
                    mChatHeadTextView.setText("BDCS!!!");
                    Toast.makeText(getApplication(),
                            "Drag and remove!", Toast.LENGTH_SHORT)
                            .show();
                    return true;

                case MotionEvent.ACTION_MOVE:
                    mChatHeadTextView.setVisibility(View.GONE);
                    parameters.x = initialX
                            + (int) (event.getRawX() - initialTouchX);
                    parameters.y = initialY
                            + (int) (event.getRawY() - initialTouchY);
                    mWindowManager.updateViewLayout(mChatHead, parameters);
                    return true;

                case MotionEvent.ACTION_UP:

                    if (parameters.y > screenHeight * 0.8) {
                        mChatHead.setVisibility(View.GONE);
                        Toast.makeText(getApplication(), "Removed!",
                                Toast.LENGTH_SHORT).show();
                        stopSelf();
                    }

                    if (parameters.x < screenWidth / 2) {
                        mLayout.removeAllViews();
                        mLayout.addView(mChatHeadImageView);
                        mLayout.addView(mChatHeadTextView);
                        mChatHeadTextView.setVisibility(View.VISIBLE);

                    } else { // Set textView to left of image
                        mLayout.removeAllViews();
                        mLayout.addView(mChatHeadTextView);
                        mLayout.addView(mChatHeadImageView);
                        mChatHeadTextView.setVisibility(View.VISIBLE);
                    }
                    return true;

                default:
                    return false;
                }`enter code here`
            }
        });

        mWindowManager.addView(mChatHead, parameters);

这会在拖动到指定位置后消除气泡。

关于android - Facebook 样式十字按钮删除 android 中的聊天头，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23494811/