Martix

最新推荐文章于 2021-07-20 15:51:22 发布

SeeYouTomorrow_s

最新推荐文章于 2021-07-20 15:51:22 发布

阅读量656

点赞数

本文链接：https://blog.youkuaiyun.com/SeeYouTomorrow_s/article/details/114293614

版权

1，创建项目
2，使用Martix完成Bitmip图片展示
3，使用Martix 平移
4，使用Martix 缩放
5，使用Martix 旋转
6，使用Martix 错切

//创建MyMartix类继承View

package com.example.day0010r;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TimePicker;

import androidx.annotation.Nullable;

public class MyMatrix extends View {

    private Matrix matrix;
    private Paint paint;
    private Bitmap bitmap;

    public MyMatrix(Context context) {
        super(context);
        init();
    }

    public MyMatrix(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        matrix = new Matrix();
        paint = new Paint();
        bitmap = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawBitmap(bitmap,matrix,paint);
    }

    public void scale(int sx,int sy){
        matrix.setScale(sx,sy);
        invalidate();
    }

    public void rotate(float degree){
        matrix.setRotate(degree);
        invalidate();
    }

    public void translate(int x,int y){
        matrix.setTranslate(x,y);
        invalidate();
    }

    public void skew(int kx,int ky){
        matrix.setSkew(kx,ky);
        invalidate();
    }




}

//主类

package com.example.day0010r;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.StaggeredGridLayoutManager;

import com.github.chrisbanes.photoview.PhotoView;
import com.google.gson.Gson;
import com.lzy.okgo.OkGo;
import com.lzy.okgo.callback.StringCallback;
import com.lzy.okgo.model.Response;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {


    
    private PhotoView photo;
    private Button sf;
    private Button xz;
    private Button wy;
    private Button qx;
    private ImageView image222;
    private MyMatrix mymartix;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();

        

        sf.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mymartix.scale(1, 2);
            }
        });
        xz.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mymartix.rotate(30);
            }
        });
        wy.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mymartix.translate(0, 20);
            }
        });
        qx.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mymartix.skew(1, 0);
            }
        });

    }

    private void initView() {
        rv = (RecyclerView) findViewById(R.id.rv);
        photo = (PhotoView) findViewById(R.id.photo);
        sf = (Button) findViewById(R.id.sf);
        xz = (Button) findViewById(R.id.xz);
        wy = (Button) findViewById(R.id.wy);
        qx = (Button) findViewById(R.id.qx);
        image222 = (ImageView) findViewById(R.id.image222);
        mymartix = (MyMatrix) findViewById(R.id.mymartix);
    }
}