Android图片左右移动 _android

一箫一剑平生意，负尽狂名十五年。这篇文章主要讲述Android图片左右移动相关的知识，希望能为你提供帮助。
这个博文，是在上一篇的基础上修改而成，这次是控制图片左右移动，上下移动类似就不在写了

package com.yuanlp.testimage; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ImageView; public class MainActivity extends AppCompatActivity { private ImageView iv; private int dx=0; //左移的距离 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); iv = (ImageView) findViewById(R.id.iv); } public void turnBig(View view){ Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.meinv); Matrix matrix=new Matrix(); matrix.setScale(2,2); //放大四倍，水平方向2倍，竖直方向2倍 //买一张纸 Bitmap bitmap1 = Bitmap.createBitmap(bitmap.getWidth() * 2, bitmap.getHeight() * 2, bitmap.getConfig()); //买个画板 Canvas canvas = new Canvas(bitmap1); //临摹会话 Paint paint = new Paint(); paint.setColor(Color.BLACK); canvas.drawBitmap(bitmap,matrix,paint); //传入新纸 iv.setImageBitmap(bitmap1); } public void turnSmall(View view){ Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.meinv); Matrix matrix=new Matrix(); matrix.setScale(0.5f,0.5f); //买个纸 Bitmap bitmap1 = Bitmap.createBitmap(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getConfig()); //买个画板 Canvas canvas=new Canvas(bitmap1); Paint paint=new Paint(); paint.setColor(Color.BLACK); canvas.drawBitmap(bitmap,matrix,paint); iv.setImageBitmap(bitmap1); } public void turnLeft(View view){ Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.meinv); dx--; //每次点击，向左移动 Matrix matrix=new Matrix(); matrix.setTranslate(dx,0); //竖直方向不移动，只有左边移动 //买个纸 Bitmap bitmap1 = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig()); //买个画板 Canvas canvas=new Canvas(bitmap1); Paint paint=new Paint(); canvas.drawColor(Color.WHITE); paint.setColor(Color.BLACK); canvas.drawBitmap(bitmap,matrix,paint); iv.setImageBitmap(bitmap1); } public void turnRight(View view){ Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.meinv); dx++; //每次点击，向左移动 Matrix matrix=new Matrix(); matrix.setTranslate(dx,0); //竖直方向不移动，只有左边移动 //买个纸 Bitmap bitmap1 = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig()); //买个画板 Canvas canvas=new Canvas(bitmap1); Paint paint=new Paint(); canvas.drawColor(Color.WHITE); paint.setColor(Color.BLACK); canvas.drawBitmap(bitmap,matrix,paint); iv.setImageBitmap(bitmap1); }}

【Android图片左右移动】本文出自 “YuanGuShi” 博客，请务必保留此出处http://cm0425.blog.51cto.com/10819451/1943890