不使用布局文件，代码中自定义界面

package com.mj.testwindow;


import android.app.Activity;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;


public class MainActivity extends Activity {


    private WindowManager mWindowManager = null;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        // setContentView();


        mWindowManager = (WindowManager) getApplicationContext()
                .getSystemService("window");


        addWin();
    }


    private WindowManager.LayoutParams mLayoutParams = new WindowManager.LayoutParams();


    private View mView = null;


    // 使用WindowManager.addView()直接添加view到WindowManager
    void addWin() {


        mView = InitView();


        mLayoutParams.type = LayoutParams.TYPE_PHONE; // 设置window
        // type
        mLayoutParams.format = PixelFormat.RGBA_8888; // 设置图片格式，效果为背景透明


        mLayoutParams.flags = LayoutParams.FLAG_ALT_FOCUSABLE_IM
                | LayoutParams.FLAG_NOT_FOCUSABLE;


        mLayoutParams.gravity = Gravity.TOP | Gravity.LEFT;


        mLayoutParams.x = 0;
        mLayoutParams.y = 0;


        // mLayoutParams.height = 100;
        // mLayoutParams.width = 150;


        mLayoutParams.height = LayoutParams.WRAP_CONTENT;
        mLayoutParams.width = LayoutParams.WRAP_CONTENT;


        mWindowManager.addView(mView, mLayoutParams);
    }


    int left_arrow_id = 0x123654;
    int right_arrow_id = left_arrow_id + 100;


    TextView mTv_right = null;
    TextView mTv_left = null;


    int ARROW_WIDTH = 40;


    // 不使用布局文件，自定义界面
    private View InitView() {
        // FrameLayout group = new FrameLayout(this);
        FrameLayout flyt = new FrameLayout(this);
        RelativeLayout layout = new RelativeLayout(this);
        mTv_left = new TextView(this);
        mTv_left.setText("<");
        mTv_left.setId(left_arrow_id);
        mTv_left.setGravity(Gravity.CENTER);
        mTv_left.setOnClickListener(mListener);


        mTv_right = new TextView(this);
        mTv_right.setText(">");
        mTv_right.setId(right_arrow_id);
        mTv_right.setGravity(Gravity.CENTER);
        mTv_right.setVisibility(View.GONE);
        mTv_right.setOnClickListener(mListener);


        RelativeLayout.LayoutParams p1 = new RelativeLayout.LayoutParams(ARROW_WIDTH,
                FrameLayout.LayoutParams.MATCH_PARENT);
        p1.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
        layout.addView(mTv_left, p1);


        RelativeLayout.LayoutParams p2 = new RelativeLayout.LayoutParams(ARROW_WIDTH,
                FrameLayout.LayoutParams.MATCH_PARENT);
        p2.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
        layout.addView(mTv_right, p2);


        ImageView img = new ImageView(this);
        img.setBackgroundResource(R.drawable.background);
        RelativeLayout.LayoutParams p3 = new RelativeLayout.LayoutParams(
                FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
        p3.addRule(RelativeLayout.LEFT_OF, right_arrow_id);
        p3.addRule(RelativeLayout.RIGHT_OF, left_arrow_id);
        layout.addView(img, p3);


        img.setOnLongClickListener(new View.OnLongClickListener() {


            @Override
            public boolean onLongClick(View v) {
                // TODO Auto-generated method stub
                mWindowManager.removeView(mView);


                return false;
            }
        });


        FrameLayout.LayoutParams p4 = new FrameLayout.LayoutParams(
                FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
        flyt.addView(layout, p4);


        return flyt;
    }


    private View.OnClickListener mListener = new View.OnClickListener() {


        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            if (v.getId() == left_arrow_id) {
                mTv_right.setVisibility(View.VISIBLE);
                mTv_left.setVisibility(View.GONE);
            } else if (v.getId() == right_arrow_id) {
                mTv_right.setVisibility(View.GONE);
                mTv_left.setVisibility(View.VISIBLE);
            }
        }
    };


}