Android应用中图片的裁剪
我们在做Android应用时,经常要用到图片的裁剪,下面以把相册里的照片设置为用户头像来解释android中如何实现裁剪。
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical" android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- <ImageView android:id="@+id/imageID"
- android:adjustViewBounds="true"
- android:src="@drawable/shan"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content" />
- <Button android:id="@+id/imageClipping" android:layout_height="50dip"
- android:text="裁剪图片" android:layout_width="150dip"/>
- </LinearLayout>
-
- <pre name="code" class="java">package com.test;
- import java.io.ByteArrayOutputStream;
- import java.io.File;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import android.app.Activity;
- import android.content.Intent;
- import android.graphics.Bitmap;
- import android.graphics.drawable.BitmapDrawable;
- import android.graphics.drawable.Drawable;
- import android.net.Uri;
- import android.os.Bundle;
- import android.os.Environment;
- import android.provider.MediaStore;
- import android.util.Log;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.Button;
- import android.widget.ImageView;
- import android.widget.Toast;
- public class MainActivity extends Activity {
- public static final int PHOTOZOOM = 2; // 缩放
- public static final int PHOTORESOULT = 3;// 结果
- private String fileName=Environment.getExternalStorageDirectory().getAbsolutePath()+"/temp.jpeg";
- public static final String IMAGE_UNSPECIFIED = "image/*";
- ImageView imageView = null;
- Button imageClippingBtn= null;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
-
- imageView = (ImageView) findViewById(R.id.imageID);
- imageClippingBtn= (Button) findViewById(R.id.imageClipping);
- imageClippingBtn.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- Drawable d=imageView.getDrawable();
- Bitmap bitmap=((BitmapDrawable)d).getBitmap();
- saveMyBitmap(fileName, bitmap);
- Uri uri=Uri.fromFile(new File(fileName));
- startPhotoZoom(uri);
-
- }
- });
- }
-
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- // 处理结果
- if (requestCode == PHOTORESOULT) {
- Bundle extras = data.getExtras();
- if (extras != null) {
- Bitmap photo = extras.getParcelable("data");
- ByteArrayOutputStream stream = new ByteArrayOutputStream();
- photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);// (0 - 100)压缩文件
- imageView.setImageBitmap(photo);
- }
-
- }
-
- super.onActivityResult(requestCode, resultCode, data);
- }
- //图片裁剪方法
- public void startPhotoZoom(Uri uri) {
- Intent intent = new Intent("com.android.camera.action.CROP");
- intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
- intent.putExtra("crop", "true");
- // aspectX aspectY 是宽高的比例
- intent.putExtra("aspectX", 1);
- intent.putExtra("aspectY", 1);
- // outputX outputY 是裁剪图片宽高
- intent.putExtra("outputX", 64);
- intent.putExtra("outputY", 64);
- intent.putExtra("return-data", true);
- startActivityForResult(intent, PHOTORESOULT);
- }
- //把bitmap保存为文件
- public void saveMyBitmap(String fileName,Bitmap mBitmap){
- File f =null;
- FileOutputStream fOut = null;
- try {
- Log.e("MainActivity", "fileName:"+fileName);
- f=new File(fileName);
- f.createNewFile();
- fOut = new FileOutputStream(f);
- mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
- } catch (Exception e) {
- e.printStackTrace();
- }
- try {
- fOut.flush();
- } catch (Exception e) {
- e.printStackTrace();
- }
- try {
- fOut.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
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