嗨，我正在尝试打开相机，我看到了有关如何使用它的 android 文档。
所以我只是将它复制粘贴到我的代码中，并且我已经设置了它的权限，但是当我单击按钮时，相机没有打开。
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
if(requestCode == CAMERA_REQUEST_CODE){
Log.d("ano_code",Integer.toString(requestCode));
if(resultCode == Activity.RESULT_OK){
File file = new File(currentPhotoPath);
selectedImage.setImageURI(Uri.fromFile(file));
}else{
Log.d("mali","mali nga");
}
}
if(requestCode == GALLERY_REQUEST_CODE){
if(resultCode == Activity.RESULT_OK){
Uri contentUri = data.getData();
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp +"."+getFileExt(contentUri);
Log.d("tag", "onActivityResult: Gallery Image Uri: " + imageFileName);
selectedImage.setImageURI(contentUri);
}
}
}
private String getFileExt(Uri contentUri) {
ContentResolver c = getContentResolver();
MimeTypeMap mime = MimeTypeMap.getSingleton();
return mime.getExtensionFromMimeType(c.getType(contentUri));
}
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);
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
currentPhotoPath = image.getAbsolutePath();
return image;
}
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) {
}
// Continue only if the File was successfully created
if (photoFile != null) {
Log.d("qqqqq","dito na ao4");
Uri photoURI = FileProvider.getUriForFile(this,
"com.example.test.android.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, CAMERA_REQUEST_CODE);
}
}
}
清单.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.test">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-feature android:name="android.hardware.camera" android:required="true"/>
<!--This should have the Activity files ONLY-->
<application
android:hardwareAccelerated="false"
android:largeHeap="true"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme.NoActionBar">
<activity
android:name=".Utilities.SplashScreen"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.example.test.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>
</application>
</manifest>
我真的不知道该怎么办，没有错误，有人也遇到这种情况吗？
这是文档的链接。
https://developer.android.com/training/camera/photobasics