Android 从相机或相册获取图片

android 调用系统camera

/*用来标识请求照相功能的activity*/

private static final int CAMERA_WITH_DATA = 3023;

/*用来标识请求gallery的activity*/

private static final int PHOTO_PICKED_WITH_DATA = 3021;

/*拍照的照片存储位置*/

private static final File PHOTO_DIR = new File(Environment.getExternalStorageDirectory() + "/DCIM/Camera");

注意此处 写的是sd卡路径需加 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 权限

如果此处写成程序路径 拍照以后 不会调用onActivityResult 原因外边程序无法访问本程序

private File mCurrentPhotoFile;//照相机拍照得到的图片
private void doPickPhotoAction() {

Context context = EditContact.this;

// Wrap our context to inflate list items using correct theme

final Context dialogContext = new ContextThemeWrapper(context,

android.R.style.Theme_Light);

String cancel="返回";

String[] choices;

choices = new String[2];

choices[0] = getString(R.string.take_photo); //拍照

choices[1] = getString(R.string.pick_photo); //从相册中选择

final ListAdapter adapter = new ArrayAdapter<String>(dialogContext,

android.R.layout.simple_list_item_1, choices);

final AlertDialog.Builder builder = new AlertDialog.Builder(

dialogContext);

builder.setTitle(R.string.attachToContact);

builder.setSingleChoiceItems(adapter, -1,

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

dialog.dismiss();

switch (which) {

case 0:{

String status=Environment.getExternalStorageState();

if(status.equals(Environment.MEDIA_MOUNTED)){//判断是否有SD卡

doTakePhoto();// 用户点击了从照相机获取

}

else{

showToast("没有SD卡");

}

break;

}

case 1:

doPickPhotoFromGallery();// 从相册中去获取

break;

}

}

});

builder.setNegativeButton(cancel, new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

dialog.dismiss();

}

});

builder.create().show();

}

}

/**

* 拍照获取图片

*

*/

protected void doTakePhoto() {

try {

// Launch camera to take photo for selected contact

PHOTO_DIR.mkdirs();// 创建照片的存储目录

mCurrentPhotoFile = new File(PHOTO_DIR, getPhotoFileName());// 给新照的照片文件命名

final Intent intent = getTakePickIntent(mCurrentPhotoFile);

startActivityForResult(intent, CAMERA_WITH_DATA);

} catch (ActivityNotFoundException e) {

Toast.makeText(this, R.string.photoPickerNotFoundText,

Toast.LENGTH_LONG).show();

}

}

public static Intent getTakePickIntent(File f) {

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE, null);

intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));

return intent;

}

/**

* 用当前时间给取得的图片命名

*

*/

private String getPhotoFileName() {

Date date = new Date(System.currentTimeMillis());

SimpleDateFormat dateFormat = new SimpleDateFormat(

"'IMG'_yyyy-MM-dd HH:mm:ss");

return dateFormat.format(date) + ".jpg";

}

// 请求Gallery程序

protected void doPickPhotoFromGallery() {

try {

// Launch picker to choose photo for selected contact

final Intent intent = getPhotoPickIntent();

startActivityForResult(intent, PHOTO_PICKED_WITH_DATA);

} catch (ActivityNotFoundException e) {

Toast.makeText(this, R.string.photoPickerNotFoundText1,

Toast.LENGTH_LONG).show();

}

}

// 封装请求Gallery的intent

public static Intent getPhotoPickIntent() {

Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);

intent.setType("image/*");

intent.putExtra("crop", "true");

intent.putExtra("aspectX", 1);

intent.putExtra("aspectY", 1);

intent.putExtra("outputX", 80);

intent.putExtra("outputY", 80);

intent.putExtra("return-data", true);

return intent;

}

// 因为调用了Camera和Gally所以要判断他们各自的返回情况,他们启动时是这样的startActivityForResult

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (resultCode != RESULT_OK)

return;

switch (requestCode) {

case PHOTO_PICKED_WITH_DATA: {// 调用Gallery返回的

final Bitmap photo = data.getParcelableExtra("data");

// 下面就是显示照片了

System.out.println(photo);

//缓存用户选择的图片

img = getBitmapByte(photo);

mEditor.setPhotoBitmap(photo);

System.out.println("set new photo");

break;

}

case CAMERA_WITH_DATA: {// 照相机程序返回的,再次调用图片剪辑程序去修剪图片

doCropPhoto(mCurrentPhotoFile);

break;

}

}

}

protected void doCropPhoto(File f) {

try {

// 启动gallery去剪辑这个照片

final Intent intent = getCropImageIntent(Uri.fromFile(f));

startActivityForResult(intent, PHOTO_PICKED_WITH_DATA);

} catch (Exception e) {

Toast.makeText(this, R.string.photoPickerNotFoundText,

Toast.LENGTH_LONG).show();

}

}

/**

* Constructs an intent for image cropping. 调用图片剪辑程序

*/

public static Intent getCropImageIntent(Uri photoUri) {

Intent intent = new Intent("com.android.camera.action.CROP");

intent.setDataAndType(photoUri, "image/*");

intent.putExtra("crop", "true");

intent.putExtra("aspectX", 1);

intent.putExtra("aspectY", 1);

intent.putExtra("outputX", 80);

intent.putExtra("outputY", 80);

intent.putExtra("return-data", true);

return intent;

}