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);
}
});
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。
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