[安卓] 实现悬浮通知效果

最近想搞一个通知提示，但是由于使用场景限制，最后决定使用Toast来实现通知的提示。虽然Toast可以进行自定义，但是还是达不到自己想要的效果。最后翻来覆去终于找到了解决方法，特此献上！

代码里有一块操作比较骚，通过反射的方式来获取到了Toast的WindowManager，思来想去，佩服了！

package xx.xx.xx;

import android.annotation.SuppressLint;
import android.content.Context;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;
import android.widget.Toast;
import com.starnet.stbsystemservice.R;
import java.lang.reflect.Field;


public class PushToast {
    private final Context mContext;
    private Toast mToast;

    public PushToast(Context context) {
        mContext = context;
    }

    public void createToast(String title, String content) {
        if (mContext == null) {
            return;
        }

        LayoutInflater inflater = LayoutInflater.from(mContext);
        @SuppressLint("InflateParams") View view = inflater.inflate(R.layout.view_push_toast, null);
        TextView tvTitle = (TextView) view.findViewById(R.id.tv_title);
        TextView tvContent = (TextView) view.findViewById(R.id.tv_content);
        tvTitle.setText(title);
        tvContent.setText(content);
        mToast = new Toast(mContext);
        mToast.setView(view);
        mToast.setDuration(Toast.LENGTH_LONG);
        mToast.setGravity(Gravity.TOP, 0, 0);
        initLayoutParams();
    }

    public void show(){
        mToast.show();
    }

    private void initLayoutParams() {
        try {
            Object mTN;
            mTN = getField(mToast, "mTN");
            if (mTN != null) {
                Object mParams = getField(mTN, "mParams");
                if (mParams instanceof WindowManager.LayoutParams) {
                    WindowManager.LayoutParams params = (WindowManager.LayoutParams) mParams;

                    params.width = WindowManager.LayoutParams.MATCH_PARENT;
                    params.height = WindowManager.LayoutParams.WRAP_CONTENT;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static Object getField(Object object, String fieldName)
            throws NoSuchFieldException, IllegalAccessException {
        Field field = object.getClass().getDeclaredField(fieldName);
        if (field != null) {
            field.setAccessible(true);
            return field.get(object);
        }
        return null;
    }
}

        PushToast mToast = new PushToast(context);
        mToast.createToast("通知: ","您的画质已经是最佳状态!");
        mToast.show();

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