基本信息
源码名称：android通过拍照、相册获取图片并显示 实例完整源码下载(亲测通过)
源码大小：1.43M
文件格式：.zip
开发语言：Java
更新时间：2015-02-06
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源码介绍
其中也包含了 将图片保存至 sd卡功能
public class MainActivity extends Activity{
private static final int PHOTO_WITH_DATA = 18; //从SD卡中得到图片
private static final int PHOTO_WITH_CAMERA = 37;// 拍摄照片
private Button btn_open;
private ImageView iv_temp;
private Dialog dialog_pic;
private String imgPath = "";
private String imgName = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
iv_temp = (ImageView) findViewById(R.id.imageView);
iv_temp.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
openPictureDialog();
}
});
btn_open = (Button) findViewById(R.id.btn_open);
btn_open.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
openPictureSelectDialog();
}
});
}
/**打开对话框**/
private void openPictureSelectDialog() {
//自定义Context,添加主题
Context dialogContext = new ContextThemeWrapper(MainActivity.this, android.R.style.Theme_Light);
String[] choiceItems= new String[2];
choiceItems[0] = "相机拍摄"; //拍照
choiceItems[1] = "本地相册"; //从相册中选择
ListAdapter adapter = new ArrayAdapter<String>(dialogContext, android.R.layout.simple_list_item_1,choiceItems);
//对话框建立在刚才定义好的上下文上
AlertDialog.Builder builder = new AlertDialog.Builder(dialogContext);
builder.setTitle("添加图片");
builder.setSingleChoiceItems(adapter, -1, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0: //相机
doTakePhoto();
break;
case 1: //从图库相册中选取
doPickPhotoFromGallery();
break;
}
dialog.dismiss();
}
});
builder.create().show();
}
/**打开图片查看对话框**/
private void openPictureDialog() {
dialog_pic = new Dialog(MainActivity.this,R.style.simple_dialog);
LayoutInflater inflater = getLayoutInflater();
View view = inflater.from(MainActivity.this).inflate(R.layout.dialog_picture, null);
ImageView imgView = (ImageView) view.findViewById(R.id.img_weibo_img);
Button btnBig = (Button) view.findViewById(R.id.btn_big);
btnBig.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,ImgDisplayActivity.class);
imgPath = getApplicationContext().getFilesDir() "/" imgName;
intent.putExtra("imgUrl", imgPath); //将图片的路径传递过去
startActivity(intent);
}
});
dialog_pic.setContentView(view);
dialog_pic.show();
displayForDlg(imgView,imgPath,btnBig); //显示内容到dialog中
}
private void displayForDlg(ImageView imgView, String imgPath2,Button btnBig) {
imgView.setVisibility(View.VISIBLE);
btnBig.setVisibility(View.VISIBLE);
imgPath = getApplicationContext().getFilesDir() "/" imgName;
System.out.println("图片文件路径----------》" imgPath);
if(!imgPath.equals("")) {
Bitmap tempBitmap = BitmapFactory.decodeFile(imgPath);
imgView.setImageBitmap(tempBitmap);//显示图片
}
}
/**You will receive this call immediately before onResume() when your activity is re-starting.**/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode == RESULT_OK) { //返回成功
switch (requestCode) {
case PHOTO_WITH_CAMERA: {//拍照获取图片
String status = Environment.getExternalStorageState();
if(status.equals(Environment.MEDIA_MOUNTED)) { //是否有SD卡
Bitmap bitmap = BitmapFactory.decodeFile(Environment.getExternalStorageDirectory() "/image.jpg");
imgName = createPhotoFileName();
//写一个方法将此文件保存到本应用下面啦
savePicture(imgName,bitmap);
if (bitmap != null) {
//为防止原始图片过大导致内存溢出，这里先缩小原图显示，然后释放原始Bitmap占用的内存
Bitmap smallBitmap = ImageTools.zoomBitmap(bitmap, bitmap.getWidth() / 5, bitmap.getHeight() / 5);
iv_temp.setImageBitmap(smallBitmap);
}
Toast.makeText(MainActivity.this, "已保存本应用的files文件夹下", Toast.LENGTH_LONG).show();
}else {
Toast.makeText(MainActivity.this, "没有SD卡", Toast.LENGTH_LONG).show();
}
break;
}
case PHOTO_WITH_DATA: {//从图库中选择图片
ContentResolver resolver = getContentResolver();
//照片的原始资源地址
Uri originalUri = data.getData();
//System.out.println(originalUri.toString()); //" content://media/external/images/media/15838 "
// //将原始路径转换成图片的路径
// String selectedImagePath = uri2filePath(originalUri);
// System.out.println(selectedImagePath); //" /mnt/sdcard/DCIM/Camera/IMG_20130603_185143.jpg "
try {
//使用ContentProvider通过URI获取原始图片
Bitmap photo = MediaStore.Images.Media.getBitmap(resolver, originalUri);
imgName = createPhotoFileName();
//写一个方法将此文件保存到本应用下面啦
savePicture(imgName,photo);
if (photo != null) {
//为防止原始图片过大导致内存溢出，这里先缩小原图显示，然后释放原始Bitmap占用的内存
Bitmap smallBitmap = ImageTools.zoomBitmap(photo, photo.getWidth() / 5, photo.getHeight() / 5);
iv_temp.setImageBitmap(smallBitmap);
}
// iv_temp.setImageURI(originalUri); //在界面上显示图片
Toast.makeText(MainActivity.this, "已保存本应用的files文件夹下", Toast.LENGTH_LONG).show();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}
super.onActivityResult(requestCode, resultCode, data);
}
/**从相册获取图片**/
private void doPickPhotoFromGallery() {
Intent intent = new Intent();
intent.setType("image/*"); // 开启Pictures画面Type设定为image
intent.setAction(Intent.ACTION_GET_CONTENT); //使用Intent.ACTION_GET_CONTENT这个Action
startActivityForResult(intent, PHOTO_WITH_DATA); //取得相片后返回到本画面
}
/**拍照获取相片**/
private void doTakePhoto() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //调用系统相机
Uri imageUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),"image.jpg"));
//指定照片保存路径（SD卡），image.jpg为一个临时文件，每次拍照后这个图片都会被替换
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
//直接使用，没有缩小
startActivityForResult(intent, PHOTO_WITH_CAMERA); //用户点击了从相机获取
}
/**创建图片不同的文件名**/
private String createPhotoFileName() {
String fileName = "";
Date date = new Date(System.currentTimeMillis()); //系统当前时间
SimpleDateFormat dateFormat = new SimpleDateFormat("'IMG'_yyyyMMdd_HHmmss");
fileName = dateFormat.format(date) ".jpg";
return fileName;
}
/**获取文件路径**/
public String uri2filePath(Uri uri)
{
String[] projection = {MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String path = cursor.getString(column_index);
return path;
}
/**保存图片到本应用下**/
private void savePicture(String fileName,Bitmap bitmap) {
FileOutputStream fos =null;
try {//直接写入名称即可，没有会被自动创建；私有：只有本应用才能访问，重新内容写入会被覆盖
fos = MainActivity.this.openFileOutput(fileName, Context.MODE_PRIVATE);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);// 把图片写入指定文件夹中
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if(null != fos) {
fos.close();
fos = null;
}
}catch(Exception e) {
e.printStackTrace();
}
}
}
}