当我尝试加载保存在手机上的图片时，我遇到了问题。
我有一个“助手班”
public class FileHelper {
public static String saveBitmapToFile(Bitmap bitmap, Context context, String fileName) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
// write the compressed bitmap to the outputStream(bytes)
bitmap.compress(Bitmap.CompressFormat.PNG, 100, bytes);
FileOutputStream fo = null;
try {
fo = context.openFileOutput(fileName, Context.MODE_PRIVATE);
} catch (FileNotFoundException e) {
Toast.makeText(context, "בעיה ,", Toast.LENGTH_SHORT).show();
}
try {
fo.write(bytes.toByteArray());
fo.close();// close file output
} catch (IOException e) {
e.printStackTrace();
}
return fileName;
}
}
这是我尝试上传照片的地方：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile2);
iv = (ImageView) findViewById(R.id.ivPic);
btnTakePic = (Button) findViewById(R.id.btnpic);
btnPickPicture = (Button) findViewById(R.id.btnpicpic);
try {
bitmap = BitmapFactory.decodeStream(this.openFileInput(PIC_FILE_NAME));
} catch (FileNotFoundException e) {
bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.cam);
}
iv.setImageBitmap(bitmap);
btnTakePic.setOnClickListener(this);
btnPickPicture.setOnClickListener(this);
}
public void onClick(View v) {
Intent intent = null;
if (v == btnTakePic) {
intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, TAKE_PICTURE);
} else if (v == btnPickPicture) {
Intent pickPickIntent = new Intent(Intent.ACTION_PICK);
File picDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
String picDirPath = picDir.getPath();
Uri uData = Uri.parse(picDirPath);
pickPickIntent.setDataAndType(uData, "image/*");
startActivityForResult(pickPickIntent, PICK_PICTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == TAKE_PICTURE && resultCode == RESULT_OK)
{
bitmap = (Bitmap) data.getExtras().get("data");
iv.setImageBitmap(bitmap);
FileHelper.saveBitmapToFile(bitmap,getApplicationContext(),PIC_FILE_NAME);
Bitmap bitmapx = iv.getDrawingCache();
Intent intent = new Intent(this, MainActivity.class);
intent.putExtra("BitmapImage", bitmapx);
} else if (requestCode == PICK_PICTURE) {
if (resultCode == RESULT_OK) {
Uri URI = data.getData();
String[] FILE = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(URI,
FILE, null, null, null);
cursor.moveToFirst();
options = new BitmapFactory.Options();
int columnIndex = cursor.getColumnIndex(FILE[0]);
String ImageDecode = cursor.getString(columnIndex);
cursor.close();
options.inSampleSize = 5;
Bitmap bmp = BitmapFactory.decodeFile(ImageDecode, options);
iv.setImageBitmap(bmp);
FileHelper.saveBitmapToFile(bmp,getApplicationContext(),PIC_FILE_NAME);
Bitmap bitmapx = iv.getDrawingCache();
Intent intent = new Intent(this, MainActivity.class);
intent.putExtra("BitmapImage", bitmapx);
}
}
}
以下是我尝试加载保存的图片的地方：
private void updateHeader()
{
ImageView ivHeader = (ImageView) mNavigationView.getHeaderView(0).findViewById(R.id.ivHeader);
try{
bitmap= BitmapFactory.decodeStream(this.openFileInput(PIC_FILE_NAME));
ivHeader.setImageBitmap(bitmap);
}
catch (FileNotFoundException e){
Toast.makeText(getApplicationContext(),"error occured",Toast.LENGTH_LONG);
}
}
我必须说没有显示Toast消息，并且没有错误。应用程序没有崩溃，但图片保持不变。