我正在開發一款旨在將智能手機變成顯微鏡的項目(也有一些圖像處理);我已決定在Android Studio中爲Android手機構建我的程序。Android模擬器不顯示存儲的圖像
在線查看我找到了一些關於如何訪問攝像頭,捕捉圖像並將其存儲在內存中的教程。出於某種原因,用於運行該程序的仿真器僅顯示捕捉圖像,但不會將其存儲在內存中。他們是模擬器的問題嗎?我將如何將我正在寫給我的Android Google Nexus 5手機的這個程序轉移?
這裏是一些XML代碼:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.user.smartphonemicroscope">
<uses-feature android:name="android.hardware.camera2"></uses-feature> <!-- Acess camera2 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".Microscope">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
這裏是一些Java:
package com.example.user.smartphonemicroscope;
import android.app.Activity;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.preference.PreferenceManager;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.hardware.camera2.CameraDevice;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import java.io.File;
public class Microscope extends Activity {
Button button;
ImageView imageView;
static final int CAM_REQUEST = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_microscope);
button = (Button) findViewById(R.id.button);
imageView = (ImageView) findViewById(R.id.image_view);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent camera_intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File file = getFile();
camera_intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
startActivityForResult(camera_intent, CAM_REQUEST);
}
});
}
private File getFile() {
File folder = new File("sdcard/camera_app");
if(!folder.exists())
{
folder.mkdir();
}
File image_file = new File(folder,"cam_image.jpg");
return image_file;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
String path = "sdcard/camera_app/cam_image.jpg";
imageView.setImageDrawable(Drawable.createFromPath(path));
}
}
我也有什麼樣子的接口的一些圖片。
Emulator Camera Accessed, after pressing capture button
Image Captured, but will not save
要在您的物理硬件上進行測試,只需將手機插入PC並啓用USB調試,然後在android studio中選擇您的硬件即可。還請查看CommonWares的答案。 – basic