自定义吐司来电显示

    private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();

public void showToast(String incomingNumber) {
        final WindowManager.LayoutParams params = mParams;
        params.height = WindowManager.LayoutParams.WRAP_CONTENT;
        params.width = WindowManager.LayoutParams.WRAP_CONTENT;
        params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
//                | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE    默认能够被触摸
                | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
        params.format = PixelFormat.TRANSLUCENT;
        //在响铃的时候显示吐司,和电话类型一致
        params.type = WindowManager.LayoutParams.TYPE_PHONE;
        params.setTitle("Toast");

        //指定吐司的所在位置(将吐司指定在左上角)
        params.gravity = Gravity.LEFT+Gravity.TOP;

        //吐司显示效果(吐司布局文件),xml-->view(吐司),将吐司挂在到windowManager窗体上
        mViewToast = View.inflate(this, R.layout.toast_view, null);
        tv_toast = (TextView) mViewToast.findViewById(R.id.tv_toast);

        //从sp中获取色值文字的索引,匹配图片,用作展示
        mDrawableIds = new int[]{
                R.drawable.call_locate_white,
                R.drawable.call_locate_orange,
                R.drawable.call_locate_blue,
                R.drawable.call_locate_gray,
                R.drawable.call_locate_green};
        int toastStyleIndex = SpUtil.getInt(getApplicationContext(), ConstantValue.TOAST_STYLE, 0);
        tv_toast.setBackgroundResource(mDrawableIds[toastStyleIndex]);

        //在窗体上挂在一个view(权限)
        mWM.addView(mViewToast, params);

    }

<!-- 在窗体上挂在view的权限 -->
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>