本文实例讲述了Android编程实现调用相册、相机及拍照后直接裁剪的方法。分享给大家供大家参考，具体如下：

package com.cvte.health.phone;import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;import android.app.Activity;import android.content.ContentResolver;import android.content.ContentUris;import android.content.Intent;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.drawable.Drawable;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;import com.cvte.health.AccountManager;import com.cvte.health.HealthApplication;import com.cvte.health.R;import com.cvte.health.api.ImageUpdater;import com.cvte.health.database.User;public class ChangePortraitActivity extends Activity { private ImageView mImageView; private Button mButtonCamera; private Button mButtonPhoto; private Button mButtonBack; private Button mButtonSave; private User mUser = null; private File mCurrentPhotoFile; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_change_portrait); HealthApplication.getInstance().addActivity(this); mUser = AccountManager.getInstance().getCurrentUser(); mImageView = (ImageView) this.findViewById(R.id.imageview_preview); mButtonCamera = (Button) this.findViewById(R.id.button_cameraButton); mButtonPhoto = (Button) this.findViewById(R.id.button_photoButton); mButtonBack = (Button) findViewById(R.id.button_back); mButtonSave = (Button) findViewById(R.id.button_save); ImageUpdater.getInstance(this).updateUserPhoto(mUser, mImageView); mButtonCamera.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); mCurrentPhotoFile = new File("mnt/sdcard/DCIM/Camera/", getPhotoFileName()); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mCurrentPhotoFile)); startActivityForResult(intent, Activity.DEFAULT_KEYS_DIALER); /* * Intent intent = new * Intent("android.media.action.IMAGE_CAPTURE"); * intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new * File(Environment .getExternalStorageDirectory(), * "camera.jpg"))); * intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0); * startActivityForResult(intent, 10); */ } }); mButtonPhoto.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.addCategory(Intent.CATEGORY_OPENABLE); intent.setType("image/*"); intent.putExtra("crop", "true"); intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1); intent.putExtra("outputX", 300); intent.putExtra("outputY", 300); intent.putExtra("return-data", true); startActivityForResult(intent, 11); } }); mButtonBack.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { finish(); } }); mButtonSave.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(ChangePortraitActivity.this, UserProfileActivity.class); mImageView.setDrawingCacheEnabled(Boolean.TRUE); intent.putExtra("BITMAP", mImageView.getDrawingCache()); // 这里可以放一个bitmap startActivity(intent); finish(); overridePendingTransition(R.anim.activity_in_from_left, R.anim.activity_out_from_right); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == 10 && resultCode == Activity.RESULT_OK) { mImageView.setImageDrawable(Drawable.createFromPath(new File( Environment.getExternalStorageDirectory(), "camera.jpg") .getAbsolutePath())); } else if (requestCode == 11 && resultCode == Activity.RESULT_OK) { Bitmap cameraBitmap = (Bitmap) data.getExtras().get("data"); mImageView.setImageBitmap(cameraBitmap); } else if (requestCode == 1 && resultCode == Activity.RESULT_OK) { Uri imgUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; ContentResolver cr = ChangePortraitActivity.this .getContentResolver(); Uri fileUri = Uri.fromFile(mCurrentPhotoFile); sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, fileUri)); try { Thread.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); } Cursor cursor = cr.query(imgUri, null, MediaStore.Images.Media.DISPLAY_NAME + "='" + mCurrentPhotoFile.getName() + "'", null, null); Uri uri = null; if (cursor != null && cursor.getCount() > 0) { cursor.moveToLast(); long id = cursor.getLong(0); uri = ContentUris.withAppendedId(imgUri, id); } final Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); intent.putExtra("crop", "true"); intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1); intent.putExtra("outputX", 300); intent.putExtra("outputY", 300); intent.putExtra("return-data", true); ChangePortraitActivity.this.startActivityForResult(intent, 3); } else if (requestCode == 3 && resultCode == Activity.RESULT_OK) { Bitmap cameraBitmap = (Bitmap) data.getExtras().get("data"); mImageView.setImageBitmap(cameraBitmap); } } private String getPhotoFileName() { Date date = new Date(System.currentTimeMillis()); SimpleDateFormat dateFormat = new SimpleDateFormat( "'IMG'_yyyyMMdd_HHmmss"); return dateFormat.format(date) + ".jpg"; }}

更多关于Android相关内容感兴趣的读者可查看本站专题：《Android拍照与图片处理技巧总结》、《Android图形与图像处理技巧总结》、《Android开发入门与进阶教程》、《Android调试技巧与常见问题解决方法汇总》、《Android基本组件用法总结》、《Android视图View技巧总结》、《Android布局layout技巧总结》及《Android控件用法总结》

希望本文所述对大家Android程序设计有所帮助。