Java “TAG”在“android.support.v4.app.FragmentActivity”中有私有访问权限
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'TAG' has private access in 'android.support.v4.app.FragmentActivity'
提问by Rushat Rai
Almost everything in my activity is working fine, except for wherever TAGis referenced. TAGgets a red line and says: 'TAG' has private access in 'android.support.v4.app.FragmentActivity'.
我的活动中几乎所有东西都运行良好，除了TAG被引用的地方。TAG得到一条红线并说：'TAG' has private access in 'android.support.v4.app.FragmentActivity'。
MainActivity (without imports)-
MainActivity（无进口）-
public class MainActivity extends AppCompatActivity {
public static final String DATA_PATH = Environment
.getExternalStorageDirectory().toString() + "/MainActivity";
public static final String lang = "eng";
protected Button _button;
protected ImageView _image;
protected TextView _field;
protected String _path;
protected boolean _taken;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String[] paths = new String[] { DATA_PATH, DATA_PATH + "tessdata/" };
for (String path : paths) {
File dir = new File(path);
if (!dir.exists()) {
if (!dir.mkdirs()) {
Log.v(TAG, "ERROR: Creation of directory " + path + " on sdcard failed");
return;
} else {
Log.v(TAG, "Created directory " + path + " on sdcard");
}
}
}
if (!(new File(DATA_PATH + "tessdata/" + lang + ".traineddata")).exists()) {
try {
AssetManager assetManager = getAssets();
InputStream in = assetManager.open("tessdata/" + lang + ".traineddata");
//GZIPInputStream gin = new GZIPInputStream(in);
OutputStream out = new FileOutputStream(DATA_PATH
+ "tessdata/" + lang + ".traineddata");
// Transfer bytes from in to out
byte[] buf = new byte[1024];
int len;
//while ((lenf = gin.read(buff)) > 0) {
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
in.close();
//gin.close();
out.close();
Log.v(TAG, "Copied " + lang + " traineddata");
} catch (IOException e) {
Log.e(TAG, "Was unable to copy " + lang + " traineddata " + e.toString());
}
}
_image = ( ImageView ) findViewById( R.id.image );
_field = ( TextView ) findViewById( R.id.field );
_button = ( Button ) findViewById( R.id.button );
_button.setOnClickListener( new ButtonClickHandler() );
_path = Environment.getExternalStorageDirectory() + "/Login Data.jpg";
}
public class ButtonClickHandler implements View.OnClickListener
{
public void onClick( View view ){
startCameraActivity();
}
}
protected void startCameraActivity()
{
File file = new File( _path );
Uri outputFileUri = Uri.fromFile( file );
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );
intent.putExtra( MediaStore.EXTRA_OUTPUT, outputFileUri );
startActivityForResult( intent, 0 );
}
protected void onPhotoTaken()
{
_taken = true;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
Bitmap bitmap = BitmapFactory.decodeFile( _path, options );
_image.setImageBitmap(bitmap);
_field.setVisibility( View.GONE );
ExifInterface exif = new ExifInterface(_path);
int exifOrientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
int rotate = 0;
switch (exifOrientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
}
if (rotate != 0) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
// Setting pre rotate
Matrix mtx = new Matrix();
mtx.preRotate(rotate);
// Rotating Bitmap & convert to ARGB_8888, required by tess
bitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, false);
}
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
TessBaseAPI baseApi = new TessBaseAPI();
baseApi.init(DATA_PATH, lang);
baseApi.setImage(bitmap);
String recognizedText = baseApi.getUTF8Text();
baseApi.end();
}
@Override
protected void onSaveInstanceState( Bundle outState ) {
outState.putBoolean( MainActivity.PHOTO_TAKEN, _taken );
}
@Override
protected void onRestoreInstanceState( Bundle savedInstanceState)
{
Log.i( "MakeMachine", "onRestoreInstanceState()");
if( savedInstanceState.getBoolean( MainActivity.PHOTO_TAKEN ) ) {
onPhotoTaken();
}
}
采纳答案by Juan Cruz Soler
You should define a constant for your tag in MainActivity:
你应该为你的标签定义一个常量MainActivity：
private static final String TAG = "MainActivity"
回答by nikeru8
try the following
尝试以下
private static final String TAG = MainActivity.class.getSimpleName();
You can use this field in your any Activity or Fragment.
您可以在任何活动或片段中使用此字段。
回答by Amit Mhaske
Well that's just an Android's way of telling us that we haven't defined TAG. To define the TAG in the current file, we can go to MainActivity Class and type "logt", you will get some auto code suggestions from Android studio, press enter there and you will get following code
好吧，这只是 Android 告诉我们尚未定义 TAG 的方式。要在当前文件中定义 TAG，我们可以转到 MainActivity Class 并输入“logt”，您将获得来自 Android Studio 的一些自动代码建议，在那里按回车，您将获得以下代码
private static final String TAG = "MainActivity";
Once you add this to your code, your error will be gone
一旦你将它添加到你的代码中，你的错误就会消失
回答by Lisa Pearls
Practical note: following is the better approach
实用说明：以下是更好的方法
private static final String TAG = MainActivity.class.getSimpleName();
as compared to:
相比于：
private static final String TAG = "MainActivity";
