【发布时间】：2017-02-23 05:06:45
【问题描述】：
构建基本应用程序并获得 IllegalArgumentException：有一个按钮来启动相机应用程序，我正在尝试将图像保存到图片中。 dispatchTakePictureIntent(); 方法在我点击图片按钮时被调用
发现了一些类似的问题，但无法解决我的问题：
- Android: FileProvider IllegalArgumentException Failed to find configured root that contains /data/data/**/files/Videos/final.mp4
- FileProvider "Failed to find configured root" exception
下面是我的代码。有人可以帮我解决我所缺少的吗？
public class CatalogDataActivity extends AppCompatActivity {
static final int REQUEST_IMAGE_CAPTURE = 1;
public String path= Environment.getExternalStorageDirectory().getAbsolutePath()+"/CatalogData";
@Override
protected void onCreate(Bundle savedInstanceState) {
//verifyStoragePermissions();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_catalog_data);
final Button btCamera=(Button)findViewById(R.id.btn_camera);
final Button btSave=(Button)findViewById(R.id.btn_save);
final EditText etProductName=(EditText)findViewById(R.id.et_productName);
final EditText etProductDescription=(EditText)findViewById(R.id.et_description);
final TextView finalText=(TextView)findViewById(R.id.tv_saved_text);
File dir=new File(path);
if(!dir.isDirectory()){
dir.mkdir();
}
btCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
/* Intent takePictureIntent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if(takePictureIntent.resolveActivity(getPackageManager())!=null){
startActivityForResult(takePictureIntent,REQUEST_IMAGE_CAPTURE);
}*/
dispatchTakePictureIntent();
}
});
btSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String newProductDataStr=etProductName.getText()+","+etProductDescription.getText()+"|";
File file=new File(path+"/catalogdata.txt");
System.out.println("Path:"+path);
writeToFile(newProductDataStr,getApplicationContext());
String data=readFromFile(getApplicationContext());
finalText.setText(data);
//finalText.
String []splitData=data.split("|");
//System.out.println(">>>>>>>>>>>>>>>>>>>>////"+splitData.length+"/////>>>>>>>>>>>>>>>>>>"+splitData[splitData.length-4]);
}
});
}
private void writeToFile(String data,Context context) {
try {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(context.openFileOutput("config1.txt", Context.MODE_APPEND));
outputStreamWriter.write(data);
outputStreamWriter.close();
}
catch (IOException e) {
System.out.println("Exception"+ "File write failed: " + e.toString());
}
}
private String readFromFile(Context context) {
String ret = "";
try {
InputStream inputStream = context.openFileInput("config1.txt");
if ( inputStream != null ) {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String receiveString = "";
StringBuilder stringBuilder = new StringBuilder();
while ( (receiveString = bufferedReader.readLine()) != null ) {
stringBuilder.append(receiveString);
}
inputStream.close();
ret = stringBuilder.toString();
}
}
catch (FileNotFoundException e) {
Log.e("login activity", "File not found: " + e.toString());
} catch (IOException e) {
Log.e("login activity", "Can not read file: " + e.toString());
}
return ret;
}
@Override
public void onActivityResult(int requestCode,int resultCode,Intent data){
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap bitMap = (Bitmap) extras.get("data");
String ImagePath = MediaStore.Images.Media.insertImage(
getContentResolver(),
bitMap,
"demo_image",
"demo_image"
);
System.out.println("Saved Image in :"+ImagePath);
}
}
String mCurrentPhotoPath;
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
if(!storageDir.isDirectory()){
storageDir.mkdir();
}
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
static final int REQUEST_TAKE_PHOTO = 1;
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
ex.printStackTrace();
}
// Continue only if the File was successfully created
if (photoFile != null) {
try {
Uri photoURI = FileProvider.getUriForFile(this,
"com.example.android.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}catch(Exception e){
e.printStackTrace();
}
}
//galleryAddPic();
}
}
private void galleryAddPic() {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(mCurrentPhotoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
}
manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.androidapp.natty.catalogcreate">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".CatalogDataActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-feature android:name="android.hardware.camera"
android:required="true" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.example.android.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths"></meta-data>
</provider>
</manifest>
file_paths.xml 放在 res/xml/file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="my_images" path="com.androidapp.natty.catalogcreate/files/Pictures" />
</paths>
activity_catalog_data.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_catalog_data"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.androidapp.natty.catalogcreate.CatalogDataActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:id="@+id/textView" />
<Button
android:text="Open Camera"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView"
android:layout_marginTop="10dp"
android:id="@+id/btn_camera"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:elevation="0dp" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:text="Product Name"
android:ems="10"
android:layout_below="@+id/btn_camera"
android:layout_marginTop="50dp"
android:id="@+id/et_productName"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textMultiLine"
android:ems="10"
android:id="@+id/et_description"
android:text="Enter Description"
android:layout_below="@+id/et_productName"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@android:drawable/ic_menu_add"
android:layout_marginTop="28dp"
android:id="@+id/iv_image1"
android:layout_below="@+id/et_description" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@android:drawable/ic_menu_add"
android:layout_alignTop="@+id/iv_image1"
android:layout_toRightOf="@+id/textView"
android:layout_toEndOf="@+id/textView"
android:id="@+id/iv_image2" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@android:drawable/ic_menu_add"
android:layout_marginLeft="41dp"
android:layout_marginStart="41dp"
android:id="@+id/iv_image3"
android:layout_alignTop="@+id/iv_image2"
android:layout_toRightOf="@+id/iv_image2"
android:layout_toEndOf="@+id/iv_image2" />
<Button
android:text="Save Product"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/iv_image2"
android:layout_marginTop="18dp"
android:id="@+id/btn_save"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/btn_save"
android:layout_marginTop="56dp"
android:text="Hello World!"
android:id="@+id/tv_saved_text" />
</RelativeLayout>
> W/System.err: java.lang.IllegalArgumentException: Failed to find configured root that contains /storage/emulated/0/Android/data/com.androidapp.natty.catalogcreate/files/Pictures/JPEG_20170222_233359_1077283085.jpg
W/System.err: at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:711)
W/System.err: at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:400)
W/System.err: at com.androidapp.natty.catalogcreate.CatalogDataActivity.dispatchTakePictureIntent(CatalogDataActivity.java:176)
W/System.err: at com.androidapp.natty.catalogcreate.CatalogDataActivity.access$000(CatalogDataActivity.java:33)
W/System.err: at com.androidapp.natty.catalogcreate.CatalogDataActivity$1.onClick(CatalogDataActivity.java:61)
W/System.err: at android.view.View.performClick(View.java:5612)
W/System.err: at android.view.View$PerformClick.run(View.java:22285)
W/System.err: at android.os.Handler.handleCallback(Handler.java:751)
W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
W/System.err: at android.os.Looper.loop(Looper.java:154)
W/System.err: at android.app.ActivityThread.main(ActivityThread.java:6123)
W/System.err: at java.lang.reflect.Method.invoke(Native Method)
W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
I/Choreographer: Skipped 2537 frames! The application may be doing too much work on its main thread.
I/art: Do full code cache collection, code=101KB, data=124KB
I/art: After code cache collection, code=64KB, data=67KB
【问题讨论】：
-
使用 6.0 taget sdk ?
-
最小 sdk 4，我已经在 7.0 中测试过
-
你需要给运行时权限，我在下面给出答案