android 9patch工具的使用()

第一步：导入图片img;

第二步：右击img, 点击（create 9_patch_file）,生成nine_img_9;(一定加前 缀)

第三步：点击(nine_img_9),调速nime_img_9,可拉伸的区域；（这个不会调整的，自己百度）

第三步：代码控制位伸的矩形区域；

下面为示例代码：

package com.example.juliciy.ninepatchproject;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.NinePatch;
import android.graphics.Paint;
import android.graphics.RectF;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorListener;
import android.hardware.SensorManager;
import android.support.annotation.ColorRes;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;

import java.util.Vector;

import static android.content.Context.SENSOR_SERVICE;

/**
 * Created by juliciy on 2018/7/1 0001.
 */

public class MyView extends SurfaceView implements SurfaceHolder.Callback, Runnable{
    private static String TAG = "MyView";
    private SurfaceHolder sfh;
    private Paint paint;
    private Thread th;
    private boolean th_flag;
    private boolean flag;
    private Canvas canvas;
    private int screenW, screenH;

    private Bitmap bmp_old;
    private Bitmap bmp_9path;
    private NinePatch np;


    public MyView(Context context) {
        super(context);
        sfh = this.getHolder();
        sfh.addCallback(this);
        paint = new Paint();
        paint.setColor(Color.WHITE);
        setFocusable(true);
        
        bmp_old = BitmapFactory.decodeResource(getResources(), R.drawable.image);
        bmp_9path = BitmapFactory.decodeResource(getResources(), R.drawable.nine_image);
        np = new NinePatch(bmp_9path, bmp_9path.getNinePatchChunk(), null);

    }


    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return true;
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        screenW = this.getWidth();
        screenH = this.getHeight();
        th_flag = true;
        th = new Thread(this);
        th.start();
    }
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        th_flag = false;
    }
    public void logic(){

    }
    public void myDraw(){
        try{
            canvas = sfh.lockCanvas();
            if(canvas != null){
                canvas.drawRGB(0,0,0);
                canvas.save();

                canvas.drawBitmap(bmp_old, 0, 0, paint);
                canvas.drawBitmap(bmp_old, null, new RectF(0,100, 200, 400), paint);

                canvas.drawBitmap(bmp_9path, 250, 0, paint);
                np.draw(canvas, new RectF(250, 100, 850, 400));
//                np.draw(canvas, rectf_9path_third);

                canvas.restore();

            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(canvas != null){
                sfh.unlockCanvasAndPost(canvas);
            }
        }
    }
    @Override
    public void run() {
        while(th_flag){
            long start = System.currentTimeMillis();
            myDraw();
            logic();
            long end = System.currentTimeMillis();
            try{
                if(end - start < 10){
                    Thread.sleep(10 - (end - start));
                }
            }catch (InterruptedException e){
                e.printStackTrace();
            }
        }
    }
}