本文同步自http://javaexception.com/archives/76

背景:

这几天做一个复制文本的需求，突然看到QQ上复制昵称跟QQ号的效果，觉得很不错，就想要模仿一波，办法比较简单粗暴，反编译QQ获取了那个.9图片,然后就是用PopWindow实现了。

解决办法:

自定义PopWindow

public class CopyContentPopWindow extends PopupWindow {
 
    private final View content;
    TextView tvLabel;
    TextView tvLabelFake;
    Activity context;
    private OnCopyContentListener onCopyContentListener;
 
    public CopyContentPopWindow(Activity context) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        content = inflater.inflate(R.layout.popwindow_copy_content, null);
        tvLabel = content.findViewById(R.id.tv_label);
        tvLabelFake = content.findViewById(R.id.tv_label_fake);
        tvLabel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (onCopyContentListener != null) {
                    onCopyContentListener.copyContent();
                }
                CopyContentPopWindow.this.dismiss();
            }
        });
        this.setContentView(content);
        this.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
        this.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
        this.setFocusable(true);
        this.setOutsideTouchable(true);
        this.update();
        ColorDrawable dw = new ColorDrawable(0000000000);
        this.setBackgroundDrawable(dw);
        this.context = context;
    }
 
    public void setTvLabel(String text) {
        tvLabel.setText(text);
        tvLabelFake.setText(text);
        update();
    }
 
    public void setOnCopyContentListener(OnCopyContentListener onCopyContentListener) {
        this.onCopyContentListener = onCopyContentListener;
    }
 
    public void showPopupWindow(View parent) {
        if (!this.isShowing()) {
            int[] location = new int[2];
            parent.getLocationOnScreen(location);
//            this.showAsDropDown(parent, 0, 0);
            showAtLocation(parent, Gravity.NO_GRAVITY, location[0], location[1]);
        } else {
            this.dismiss();
        }
    }
 
    public interface OnCopyContentListener {
        void copyContent();
    }
}

具体使用代码:

public class MainActivity extends AppCompatActivity {
 
    TextView tvNickName;
    TextView tvQQNum;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvNickName = findViewById(R.id.tv_nick_name);
        tvQQNum = findViewById(R.id.tv_qq_num);
        tvNickName.setOnClickListener(v -> {
            CopyContentPopWindow copyContentPopWindow = new CopyContentPopWindow(MainActivity.this);
            copyContentPopWindow.setTvLabel("复制");
            copyContentPopWindow.setOnCopyContentListener(() -> {
                ClipboardManager cm = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
                ClipData clipData = ClipData.newPlainText("Label", tvNickName.getText().toString());
                cm.setPrimaryClip(clipData);
                Toast.makeText(MainActivity.this, "复制成功", Toast.LENGTH_LONG).show();
            });
            copyContentPopWindow.showPopupWindow(tvNickName);
        });
 
        tvQQNum.setOnClickListener(v -> {
            CopyContentPopWindow copyContentPopWindow = new CopyContentPopWindow(MainActivity.this);
            copyContentPopWindow.setTvLabel("复制QQ号");
            copyContentPopWindow.setOnCopyContentListener(() -> {
                ClipboardManager cm = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
                ClipData clipData