创建一个位图的拷贝
也是直接上代码吧=。=
1 package cn.itcast.bitmapcopy; 2 3 import java.io.FileNotFoundException; 4 5 import android.app.Activity; 6 import android.content.Intent; 7 import android.graphics.Bitmap; 8 import android.graphics.BitmapFactory; 9 import android.graphics.Canvas; 10 import android.graphics.Matrix; 11 import android.graphics.Paint; 12 import android.net.Uri; 13 import android.os.Bundle; 14 import android.view.View; 15 import android.widget.ImageView; 16 17 public class DemoActivity extends Activity { 18 private ImageView iv,iv_copy; 19 20 @Override 21 public void onCreate(Bundle savedInstanceState) { 22 super.onCreate(savedInstanceState); 23 setContentView(R.layout.main); 24 iv = (ImageView) findViewById(R.id.iv); 25 iv_copy = (ImageView) findViewById(R.id.iv_copy); 26 27 } 28 29 30 public void selectImage(View view){ 31 Intent intent = new Intent(); 32 intent.setAction("android.intent.action.PICK"); 33 intent.addCategory("android.intent.category.DEFAULT"); 34 intent.setType("image/*"); 35 startActivityForResult(intent, 0); 36 } 37 38 39 @Override 40 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 41 try { 42 if (data != null) { 43 // 得到点击图片的uri 44 Uri uri = data.getData(); 45 //原图 46 Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri)); 47 iv.setImageBitmap(bitmap); 48 //原图的拷贝 49 Bitmap alterBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getWidth(), bitmap.getConfig()); 50 //以拷贝图片的为模板创建一个画布 51 Canvas canvas = new Canvas(alterBitmap); 52 canvas.drawBitmap(bitmap, new Matrix(), new Paint()); 53 iv_copy.setImageBitmap(alterBitmap); 54 } 55 } catch (FileNotFoundException e) { 56 e.printStackTrace(); 57 } 58 super.onActivityResult(requestCode, resultCode, data); 59 } 60 }
