Save Image to Android device
Solved
Mobile and Embedded
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Thanks! While following your steps I get an error. In the application output it says; "Unable to start "pdapp.mediascanner"."
Using logcat I get:
I/ActivityManager( 712): START u0 {flg=0x10000000 cmp=pdapp.mediascanner/.MediaScanner} from uid 2000 on display 0 W/ActivityManager( 712): Permission Denial: starting Intent { flg=0x10000000 cmp=pdapp.mediascanner/.MediaScanner } from null (pid=21117, uid=2000) not exported from uid 10104 I/art (21117): System.exit called, status: 1 I/AndroidRuntime(21117): VM exiting with result code 1.And also this:
W/PackageManager( 1369): Failure retrieving resources for pdapp.mediascanner: Resource ID #0x0I followed your steps to the point.
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Well, i tried a lot of ways and sendBroadcast() did not work for me. So maybe my way isnt the shortest one, but it works and thats what matters, doesnt it?
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Create the android files "create Android APK"
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set the package name, e.g. "aha.androscanner" in manifest
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open manifest in text mode and replace android:name="org.qtproject.qt5.android.bindings.QtActivity" with android:name="aha.androscanner.AndroScannerInJava"
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Create a subdirectory below the android folder, e.g. ...android/src/aha/androscanner
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Put in a java file, named exactly like in point 3, e.g. AndroScannerInJava.java and add it to project
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add "android: QT += androidextras" to your .pro file
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Fill in the code
AndroScannerInJava.java
package aha.androscanner; import android.media.MediaScannerConnection; import android.os.Bundle; public class AndroScannerInJava extends org.qtproject.qt5.android.bindings.QtActivity { public static MediaScannerConnection s_mMs; @Override public void onCreate(Bundle savedInstanceState) { System.out.println("in the activity"); super.onCreate(savedInstanceState); s_mMs = new MediaScannerConnection(getApplicationContext(), null); s_mMs.connect(); } public static void scanForPicture(String name) { System.out.print("scan for picture -> "); System.out.println(name); s_mMs.scanFile(name, null); } }Within Qt code you call:
void MainWindow::saveThatPicture() { qDebug() << "saveThatPicture!"; QPixmap pix(700,700); pix.fill(Qt::red); QDir picDir = QDir(QStandardPaths::writableLocation(QStandardPaths::PicturesLocation)); QDir saveDir = QDir(picDir.filePath("aha")); if(!saveDir.exists()) picDir.mkdir("aha"); QString filePath = saveDir.filePath("test.jpg"); pix.save(filePath); QAndroidJniObject::callStaticMethod<void>("aha/androscanner/AndroScannerInJava", "scanForPicture", "(Ljava/lang/String;)V", QAndroidJniObject::fromString(filePath).object<jstring>()); }Manifest.xml
<?xml version='1.0' encoding='utf-8'?> <manifest package="aha.androscanner" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="1.0" android:versionCode="1" android:installLocation="auto"> <application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="-- %%INSERT_APP_NAME%% --"> <activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|layoutDirection|locale|fontScale|keyboard|keyboardHidden|navigation" android:name="aha.androscanner.AndroScannerInJava" android:label="-- %%INSERT_APP_NAME%% --" android:screenOrientation="unspecified" android:launchMode="singleTop"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> <meta-data android:name="android.app.lib_name" android:value="-- %%INSERT_APP_LIB_NAME%% --"/> <meta-data android:name="android.app.qt_sources_resource_id" android:resource="@array/qt_sources"/> <meta-data android:name="android.app.repository" android:value="default"/> <meta-data android:name="android.app.qt_libs_resource_id" android:resource="@array/qt_libs"/> <meta-data android:name="android.app.bundled_libs_resource_id" android:resource="@array/bundled_libs"/> <!-- Deploy Qt libs as part of package --> <meta-data android:name="android.app.bundle_local_qt_libs" android:value="-- %%BUNDLE_LOCAL_QT_LIBS%% --"/> <meta-data android:name="android.app.bundled_in_lib_resource_id" android:resource="@array/bundled_in_lib"/> <meta-data android:name="android.app.bundled_in_assets_resource_id" android:resource="@array/bundled_in_assets"/> <!-- Run with local libs --> <meta-data android:name="android.app.use_local_qt_libs" android:value="-- %%USE_LOCAL_QT_LIBS%% --"/> <meta-data android:name="android.app.libs_prefix" android:value="/data/local/tmp/qt/"/> <meta-data android:name="android.app.load_local_libs" android:value="-- %%INSERT_LOCAL_LIBS%% --"/> <meta-data android:name="android.app.load_local_jars" android:value="-- %%INSERT_LOCAL_JARS%% --"/> <meta-data android:name="android.app.static_init_classes" android:value="-- %%INSERT_INIT_CLASSES%% --"/> <!-- Messages maps --> <meta-data android:value="@string/ministro_not_found_msg" android:name="android.app.ministro_not_found_msg"/> <meta-data android:value="@string/ministro_needed_msg" android:name="android.app.ministro_needed_msg"/> <meta-data android:value="@string/fatal_error_msg" android:name="android.app.fatal_error_msg"/> <!-- Messages maps --> <!-- Splash screen --> <!-- <meta-data android:name="android.app.splash_screen_drawable" android:resource="@drawable/logo"/> --> <!-- Splash screen --> <!-- Background running --> <!-- Warning: changing this value to true may cause unexpected crashes if the application still try to draw after "applicationStateChanged(Qt::ApplicationSuspended)" signal is sent! --> <meta-data android:name="android.app.background_running" android:value="false"/> <!-- Background running --> <!-- auto screen scale factor --> <meta-data android:name="android.app.auto_screen_scale_factor" android:value="false"/> <!-- auto screen scale factor --> </activity> </application> <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="14"/> <supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/> <!-- The following comment will be replaced upon deployment with default permissions based on the dependencies of the application. Remove the comment if you do not require these default permissions. --> <!-- %%INSERT_PERMISSIONS --> <!-- The following comment will be replaced upon deployment with default features based on the dependencies of the application. Remove the comment if you do not require these default features. --> <!-- %%INSERT_FEATURES --> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> </manifest>Works fine.
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