[英]Qt and Android Gallery - MediaStore using QAndroidJniObject
I am writing a code that needs to get an image path from Android Gallery. 我正在编写需要从Android Gallery获取图像路径的代码。 The code was written using
QAndroidJniObject
to write a equivalent java
code in Qt
该代码是使用
QAndroidJniObject
编写的,以在Qt
编写等效的java
代码
My problem is that I didn't figure out how to get the Android MediaStore columns
to return the image path. 我的问题是我没有弄清楚如何获取
Android MediaStore columns
以返回图像路径。 I have tried several ways with no success: 我尝试了几种方法但均未成功:
QAndroidJniObject dadosAndroid = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore$MediaColumns", "DATA", "Ljava/lang/String;")
QAndroidJniObject dadosAndroid = QAndroidJniObject::fromString("MediaColumns.DATA")
QAndroidJniObject dadosAndroid = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore", "DATA", "Ljava/lang/String;")
QAndroidJniObject dadosAndroid = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore.Images.Media", "EXTERNAL_CONTENT_URI", "Landroid/net/Uri;")
QAndroidJniObject dadosAndroid = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore.Images.ImageColumns", "BUCKET_DISPLAY_NAME", "Landroid/net/Uri;")
How can I do that? 我怎样才能做到这一点? My complete code is below.
我的完整代码如下。
void imagePickerAndroid::handleActivityResult(int receiverRequestCode, int resultCode, const QAndroidJniObject &data)
{
qDebug() << "Trabalha com os dados";
jint RESULT_OK = QAndroidJniObject::getStaticField<jint>("android/app/Activity", "RESULT_OK");
if (receiverRequestCode == 101 && resultCode == RESULT_OK) {
QAndroidJniObject uri = data.callObjectMethod("getData", "()Landroid/net/Uri;");
QAndroidJniObject dadosAndroid = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore", "DATA", "Ljava/lang/String;");
QAndroidJniObject contentResolver = QtAndroid::androidActivity().callObjectMethod("getContentResolver", "()Landroid/content/ContentResolver;");
QAndroidJniObject cursor = contentResolver.callObjectMethod("query", "(Landroid/net/Uri;[Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)Landroid/database/Cursor;", uri.object<jobject>(), 0, 0, 0, 0);
cursor.callMethod<jboolean>("moveToFirst", "()Z");
jint columnIndex = cursor.callMethod<jint>("getColumnIndexOrThrow", "(Ljava/lang/String;)I", dadosAndroid.object<jstring>());
//columnIndex returns 0
QAndroidJniObject result = cursor.callObjectMethod("getString", "(I)Ljava/lang/String;", columnIndex);
}
else
{
qDebug() << "Caminho errado";
}
}
Answering my own question. 回答我自己的问题。
Here is the code to the handleActivityResult
to get the full image path
from android gallery
using java equivalent code written with Qt: 这是
handleActivityResult
的代码,使用使用Qt编写的Java等效代码从android gallery
获取完整的image path
:
void imagePickerAndroid::handleActivityResult(int receiverRequestCode, int resultCode, const QAndroidJniObject &data)
{
jint RESULT_OK = QAndroidJniObject::getStaticField<jint>("android/app/Activity", "RESULT_OK");
if (receiverRequestCode == 101 && resultCode == RESULT_OK)
{
QAndroidJniObject uri = data.callObjectMethod("getData", "()Landroid/net/Uri;");
QAndroidJniObject dadosAndroid = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore$MediaColumns", "DATA", "Ljava/lang/String;");
QAndroidJniEnvironment env;
jobjectArray projecao = (jobjectArray)env->NewObjectArray(1, env->FindClass("java/lang/String"), NULL);
jobject projacaoDadosAndroid = env->NewStringUTF(dadosAndroid.toString().toStdString().c_str());
env->SetObjectArrayElement(projecao, 0, projacaoDadosAndroid);
QAndroidJniObject contentResolver = QtAndroid::androidActivity().callObjectMethod("getContentResolver", "()Landroid/content/ContentResolver;");
QAndroidJniObject cursor = contentResolver.callObjectMethod("query", "(Landroid/net/Uri;[Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)Landroid/database/Cursor;", uri.object<jobject>(), projecao, NULL, NULL, NULL);
jint columnIndex = cursor.callMethod<jint>("getColumnIndex", "(Ljava/lang/String;)I", dadosAndroid.object<jstring>());
cursor.callMethod<jboolean>("moveToFirst", "()Z");
QAndroidJniObject resultado = cursor.callObjectMethod("getString", "(I)Ljava/lang/String;", columnIndex);
QString imagemCaminho = "file://" + resultado.toString();
emit imagemCaminhoSignal(imagemCaminho);
}
else
{
qDebug() << "Caminho errado";
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.