- iOS/Objective-C 元类和类别
- objective-c - -1001 错误,当 NSURLSession 通过 httpproxy 和/etc/hosts
- java - 使用网络类获取 url 地址
- ios - 推送通知中不播放声音
请帮忙理解什么意思:E/Camera: Error 2。我的相机代码仅在 android 6.0 上不起作用,其他的都有效。此代码用于扫描二维码。 6.0 预览版不包括在内,但您可以包括 flash。
运行时权限处于 Activity 状态。有时:W/System.err: java.lang.RuntimeException: getParameters 在 onPreviewFrame 中失败(空参数)。
简单相机 View :
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.ImageFormat;
import android.graphics.Point;
import android.hardware.Camera;
import android.os.Build;
import android.util.Log;
import android.view.Display;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.RelativeLayout;
import java.util.List;
public class SimpleCameraView extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder surfaceHolder;
private Camera camera;
private Camera.PreviewCallback previewCallback;
private Display display;
public SimpleCameraView(Context context, Camera.PreviewCallback previewCallback) {
super(context);
this.previewCallback = previewCallback;
this.display = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
this.surfaceHolder = this.getHolder();
this.surfaceHolder.addCallback(this);
this.surfaceHolder.setType(3);
this.setKeepScreenOn(true);
this.configureCamera(this.getResources().getConfiguration());
}
public Camera getCamera() {
try {
this.camera = Camera.open();
//this.camera.lock();
Log.e("1111111","getCamera");
} catch (Exception var2) {
var2.printStackTrace();
}
return this.camera;
}
public void surfaceCreated(SurfaceHolder holder) {
try {
this.camera.setPreviewDisplay(holder);
Log.e("1111111","surfaceCreated");
} catch (Exception var3) {
var3.printStackTrace();
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
this.stopCamera();
Log.e("1111111","surfaceDestroy");
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
startCamera();
Log.e("1111111","surfaceChanged");
}
public boolean configureCamera(Configuration configuration) {
try {
this.getCamera();
if (this.camera != null) {
int e = this.getScreenWidth();
int height = this.getScreenHeight();
int displayOrientationDegrees = this.getDisplayOrientationDegrees(this.display);
this.camera.setDisplayOrientation(displayOrientationDegrees);
Camera.Size previewSize = this.camera.getParameters().getPreviewSize();
float aspect = (float) previewSize.width / (float) previewSize.height;
ViewGroup.LayoutParams cameraHolderParams = new RelativeLayout.LayoutParams(480,640);
if (configuration.orientation == 1) {
cameraHolderParams.height = height;
cameraHolderParams.width = (int) ((float) height / aspect);
} else {
cameraHolderParams.width = e;
cameraHolderParams.height = (int) ((float) e / aspect);
}
this.setLayoutParams(cameraHolderParams);
Log.e("1111111","configureCamera");
return true;
}
} catch (Exception var8) {
var8.printStackTrace();
}
return false;
}
private int getScreenWidth() {
if (Build.VERSION.SDK_INT < 13) {
return this.display.getWidth();
} else {
Point size = new Point();
this.display.getSize(size);
return size.x;
}
}
private int getScreenHeight() {
if (Build.VERSION.SDK_INT < 13) {
return this.display.getHeight();
} else {
Point size = new Point();
this.display.getSize(size);
return size.y;
}
}
private int getDisplayOrientationDegrees(Display display) {
int orientation = this.getResources().getConfiguration().orientation;
short displayOrientationDegrees;
switch (display.getRotation()) {
case 0:
if (orientation == 1) {
displayOrientationDegrees = 90;
} else {
displayOrientationDegrees = 0;
}
break;
case 1:
if (orientation == 2) {
displayOrientationDegrees = 0;
} else {
displayOrientationDegrees = 270;
}
break;
case 2:
if (orientation == 1) {
displayOrientationDegrees = 270;
} else {
displayOrientationDegrees = 180;
}
break;
case 3:
if (orientation == 2) {
displayOrientationDegrees = 180;
} else {
displayOrientationDegrees = 90;
}
break;
default:
displayOrientationDegrees = 0;
}
return displayOrientationDegrees;
}
public void stopCamera() {
try {
this.camera.stopPreview();
this.camera.setPreviewCallback((Camera.PreviewCallback) null);
this.camera.release();
this.camera = null;
Log.e("1111111","stopCamera");
} catch (Exception var2) {
var2.printStackTrace();
}
}
public void startCamera() {
try {
if (this.surfaceHolder.getSurface() == null) {
Log.e("1111111","null surface");
return;
}
this.camera.reconnect();
this.camera.setPreviewDisplay(this.surfaceHolder);
if (this.previewCallback != null) {
this.camera.setPreviewCallback(this.previewCallback);
}
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
int rotate = (info.orientation + 360) % 360;
Camera.Parameters params = camera.getParameters();
params.setJpegQuality(50);
params.setPictureFormat(ImageFormat.JPEG);
List<Camera.Size> sizes = params.getSupportedPictureSizes();
Camera.Size size = sizes.get(0);
/*for (int i=0;i<sizes.size();i++)
if (sizes.get(i).width > 1000 && sizes.get(i).width<1500)
if (sizes.get(i).height < 2000 && sizes.get(i).height> 1500)
size = sizes.get(i);*/
if (size.width > 480) {
for (int i = 0; i < sizes.size(); i++)
if (sizes.get(i).width < size.width && sizes.get(i).width > 480)
size = sizes.get(i);
} else
for (int i = 0; i < sizes.size(); i++)
if (sizes.get(i).width > size.width && sizes.get(i).width < 1000)
size = sizes.get(i);
params.setPictureSize(size.width, size.height);
params.setRotation(rotate);
camera.setDisplayOrientation(90);
camera.setParameters(params);
this.camera.startPreview();
Log.e("1111111","startCamera");
} catch (Exception var2) {
var2.printStackTrace();
}
}
}
简单相机 View :
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PreviewCallback;
import android.hardware.Camera.Size;
import android.os.Bundle;
import android.os.Handler;
import android.os.Vibrator;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import java.util.Iterator;
import net.sourceforge.zbar.Image;
import net.sourceforge.zbar.ImageScanner;
import net.sourceforge.zbar.Symbol;
import net.sourceforge.zbar.SymbolSet;
public class SimpleScannerFragment extends Fragment {
private ImageScanner scanner;
private SimpleCameraView cameraView;
private PackageManager packageManager;
private Vibrator vibrator;
private Handler configurationHandler = new Handler();
private Handler autoFocusHandler = new Handler();
private Runnable reconfigureRunnable = new SimpleScannerFragment.CustomConfigureRunnable();
private Runnable runAutoFocus = new SimpleScannerFragment.CustomAutoFocusRunnable();
private PreviewCallback previewCallback = new SimpleScannerFragment.CustomPreviewCallback();
private AutoFocusCallback autoFocusCallback = new SimpleScannerFragment.CustomAutoFocusCallback();
private ScannerListener scannerListener;
public SimpleScannerFragment() {
}
public void setScannerListener(ScannerListener scannerListener) {
this.scannerListener = scannerListener;
}
public SimpleCameraView getCamera() {
return cameraView;
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
this.vibrator = (Vibrator) this.getActivity().getSystemService(Context.VIBRATOR_SERVICE);
this.scanner = new ImageScanner();
this.scanner.setConfig(0, 256, 3);
this.scanner.setConfig(0, 257, 3);
Log.e("1111111","create");
}
public void onPause() {
super.onPause();
try {
this.cameraView.stopCamera();
this.stopAutofocus();
Log.e("1111111","onpause");
} catch (Exception var2) {
var2.printStackTrace();
}
}
public void onResume() {
super.onResume();
try {
this.configureCamera();
Log.e("1111111","onresume");
} catch (Exception var2) {
var2.printStackTrace();
}
}
public void stopAutofocus() {
if (this.isHaveAutoFocus() && this.cameraView.getCamera() != null) {
this.autoFocusHandler.removeCallbacks(this.runAutoFocus);
this.cameraView.getCamera().cancelAutoFocus();
Log.e("1111111","stopautofocus");
}
}
private void startAutofocus() {
if (this.isHaveAutoFocus()) {
this.autoFocusHandler.postDelayed(this.runAutoFocus, 3000L);
this.cameraView.getCamera().autoFocus(this.autoFocusCallback);
Log.e("1111111","startautofocus");
}
}
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
this.configureCamera();
Log.e("1111111","onconfigurationchanged");
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
this.cameraView = new SimpleCameraView(inflater.getContext(), this.previewCallback);
Log.e("1111111","createview");
return this.cameraView;
}
private boolean isHaveAutoFocus() {
if (this.packageManager == null) {
this.packageManager = this.getActivity().getPackageManager();
}
return this.packageManager.hasSystemFeature("android.hardware.camera.autofocus");
}
private void configureCamera() {
this.configurationHandler.postDelayed(this.reconfigureRunnable, 500L);
Log.e("1111111","confCamera");
}
static {
System.loadLibrary("iconv");
}
private class CustomPreviewCallback implements PreviewCallback {
private long lastSnapshotTime;
private CustomPreviewCallback() {
}
public void onPreviewFrame(byte[] data, Camera incomingCamera) {
try {
if (System.currentTimeMillis() > this.lastSnapshotTime) {
this.lastSnapshotTime = System.currentTimeMillis() + 3500L;
Camera.Parameters e = incomingCamera.getParameters();
Size previewSize = e.getPreviewSize();
Image barcode = new Image(previewSize.width, previewSize.height, "Y800");
barcode.setData(data);
if (SimpleScannerFragment.this.scanner.scanImage(barcode) != 0) {
SymbolSet scannerResults = SimpleScannerFragment.this.scanner.getResults();
if (SimpleScannerFragment.this.vibrator != null) {
SimpleScannerFragment.this.vibrator.vibrate(300L);
}
Iterator i$ = scannerResults.iterator();
while (i$.hasNext()) {
Symbol symbol = (Symbol) i$.next();
if (SimpleScannerFragment.this.scannerListener == null) {
Toast.makeText(SimpleScannerFragment.this.getActivity(), symbol.getData(), Toast.LENGTH_LONG).show();
} else {
SimpleScannerFragment.this.scannerListener.onDataReceive(symbol.getData(), symbol.getType());
}
}
}
}
} catch (Exception var9) {
var9.printStackTrace();
}
}
}
private class CustomConfigureRunnable implements Runnable {
private CustomConfigureRunnable() {
}
public void run() {
try {
boolean e = SimpleScannerFragment.this.cameraView.configureCamera(SimpleScannerFragment.this.getResources().getConfiguration());
if (!e) {
SimpleScannerFragment.this.configurationHandler.postDelayed(this, 500L);
SimpleScannerFragment.this.cameraView.stopCamera();
} else {
SimpleScannerFragment.this.configurationHandler.removeCallbacks(this);
SimpleScannerFragment.this.cameraView.startCamera();
SimpleScannerFragment.this.startAutofocus();
}
} catch (Exception var2) {
var2.printStackTrace();
}
}
}
private class CustomAutoFocusRunnable implements Runnable {
private CustomAutoFocusRunnable() {
}
public void run() {
try {
if (SimpleScannerFragment.this.cameraView != null && SimpleScannerFragment.this.cameraView.getCamera() != null && SimpleScannerFragment.this.isHaveAutoFocus()) {
SimpleScannerFragment.this.cameraView.getCamera().autoFocus(SimpleScannerFragment.this.autoFocusCallback);
}
} catch (Exception var2) {
var2.printStackTrace();
}
}
}
private class CustomAutoFocusCallback implements AutoFocusCallback {
private CustomAutoFocusCallback() {
}
public void onAutoFocus(boolean success, Camera camera) {
SimpleScannerFragment.this.autoFocusHandler.postDelayed(SimpleScannerFragment.this.runAutoFocus, 3000L);
}
}
}
list :
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.VIBRATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-feature android:name="android.hardware.vibrate" android:required="false"/>
<uses-feature android:name="android.hardware.camera"
android:required="true" />
<uses-feature android:name="android.hardware.camera.autofocus" android:required="true" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature
android:name="android.hardware.camera.flash"
android:required="true" />
查看:
<fragment
android:id="@+id/scannerFragment"
class="com.app.reclamavdom.app.SimpleScannerFragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
堆栈跟踪:
06-15 12:10:18.485 13037-13037/com.app.reclamavdom.app E/1111111: create
06-15 12:10:18.485 13037-13037/com.app.reclamavdom.app E/1111111: confCamera
06-15 12:10:18.486 13037-13037/com.app.reclamavdom.app E/1111111: onresume
06-15 12:10:18.571 13037-13122/com.app.reclamavdom.app D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
[ 06-15 12:10:18.586 13037:13037 D/ ]
HostConnection::get() New Host Connection established 0xacbb29a0, tid 13037
[ 06-15 12:10:19.067 13037:13122 D/ ]
HostConnection::get() New Host Connection established 0xaec26630, tid 13122
06-15 12:10:19.083 13037-13122/com.app.reclamavdom.app I/OpenGLRenderer: Initialized EGL, version 1.4
06-15 12:10:19.843 13037-13037/com.app.reclamavdom.app E/1111111: surfaceCreated
06-15 12:10:19.958 13037-13037/com.app.reclamavdom.app E/1111111: startCamera
06-15 12:10:19.958 13037-13037/com.app.reclamavdom.app E/1111111: surfaceChanged
06-15 12:10:19.990 13037-13037/com.app.reclamavdom.app I/Choreographer: Skipped 78 frames! The application may be doing too much work on its main thread.
06-15 12:10:26.913 13037-13043/com.app.reclamavdom.app W/art: Suspending all threads took: 84.122ms
06-15 12:10:27.227 13037-13037/com.app.reclamavdom.app W/art: Verification of android.graphics.drawable.Drawable android.support.v7.widget.ActionMenuPresenter.getOverflowIcon() took 138.051ms
06-15 12:10:27.657 13037-13037/com.app.reclamavdom.app E/1111111: getCamera
06-15 12:10:27.658 13037-13037/com.app.reclamavdom.app E/1111111: configureCamera
06-15 12:10:27.671 13037-13037/com.app.reclamavdom.app E/1111111: startCamera
06-15 12:10:27.677 13037-13037/com.app.reclamavdom.app E/1111111: getCamera
06-15 12:10:27.677 13037-13037/com.app.reclamavdom.app E/1111111: startautofocus
06-15 12:10:27.696 13037-13037/com.app.reclamavdom.app I/Choreographer: Skipped 460 frames! The application may be doing too much work on its main thread.
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: java.lang.RuntimeException: getParameters failed (empty parameters)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at android.hardware.Camera.native_getParameters(Native Method)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at android.hardware.Camera.getParameters(Camera.java:1890)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at com.app.reclamavdom.app.SimpleScannerFragment$CustomPreviewCallback.onPreviewFrame(SimpleScannerFragment.java:144)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1110)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at android.os.Looper.loop(Looper.java:148)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5417)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at java.lang.reflect.Method.invoke(Native Method)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
06-15 12:10:27.904 13037-13037/com.app.reclamavdom.app W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
06-15 12:10:27.905 13037-13037/com.app.reclamavdom.app E/Camera: Error 2
06-15 12:10:27.905 13037-13037/com.app.reclamavdom.app E/Camera: Error 2
06-15 12:10:30.708 13037-13037/com.app.reclamavdom.app E/1111111: getCamera
06-15 12:10:30.717 13037-13037/com.app.reclamavdom.app E/1111111: getCamera
06-15 12:10:30.717 13037-13037/com.app.reclamavdom.app E/Camera: Error 2
06-15 12:10:30.717 13037-13037/com.app.reclamavdom.app E/Camera: Error 2
最佳答案
尝试在您的应用关闭时正确关闭相机。让 session 保持打开状态可能会导致 Could not open camera: Too many users (-87)
错误,该错误不会出现在您的应用程序标签下,因此通常会在日志中遗漏。
如果是这种情况,重启设备应该可以启动并运行
关于android - 相机错误2 android 6.0,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37834961/
我最近在/ drawable中添加了一些.gifs,以便可以将它们与按钮一起使用。这个工作正常(没有错误)。现在,当我重建/运行我的应用程序时,出现以下错误: Error: Gradle: Execu
Android 中有返回内部存储数据路径的方法吗? 我有 2 部 Android 智能手机(Samsung s2 和 s7 edge),我在其中安装了一个应用程序。我想使用位于这条路径中的 sqlit
这个问题在这里已经有了答案: What's the difference between "?android:" and "@android:" in an android layout xml f
我只想知道 android 开发手机、android 普通手机和 android root 手机之间的实际区别。 我们不能从实体店或除 android marketplace 以外的其他地方购买开发手
自Gradle更新以来,我正在努力使这个项目达到标准。这是一个团队项目,它使用的是android-apt插件。我已经进行了必要的语法更改(编译->实现和apt->注释处理器),但是编译器仍在告诉我存在
我是android和kotlin的新手,所以请原谅要解决的一个非常简单的问题! 我已经使用导航体系结构组件创建了一个基本应用程序,使用了底部的导航栏和三个导航选项。每个导航选项都指向一个专用片段,该片
我目前正在使用 Facebook official SDK for Android . 我现在正在使用高级示例应用程序,但我不知道如何让它获取应用程序墙/流/状态而不是登录的用户。 这可能吗?在那种情
我在下载文件时遇到问题, 我可以在模拟器中下载文件,但无法在手机上使用。我已经定义了上网和写入 SD 卡的权限。 我在服务器上有一个 doc 文件,如果用户单击下载。它下载文件。这在模拟器中工作正常但
这个问题在这里已经有了答案: What is the difference between gravity and layout_gravity in Android? (22 个答案) 关闭 9
任何人都可以告诉我什么是 android 缓存和应用程序缓存,因为当我们谈论缓存清理应用程序时,它的作用是,缓存清理概念是清理应用程序缓存还是像内存管理一样主存储、RAM、缓存是不同的并且据我所知,缓
假设应用程序 Foo 和 Eggs 在同一台 Android 设备上。任一应用程序都可以获取设备上所有应用程序的列表。一个应用程序是否有可能知道另一个应用程序是否已经运行以及运行了多长时间? 最佳答案
我有点困惑,我只看到了从 android 到 pc 或者从 android 到 pc 的例子。我需要制作一个从两部手机 (android) 连接的 android 应用程序进行视频聊天。我在想,我知道
用于使用 Android 以编程方式锁定屏幕。我从 Stackoverflow 之前关于此的问题中得到了一些好主意,并且我做得很好,但是当我运行该代码时,没有异常和错误。而且,屏幕没有锁定。请在这段代
文档说: android:layout_alignParentStart If true, makes the start edge of this view match the start edge
我不知道这两个属性和高度之间的区别。 以一个TextView为例,如果我将它的layout_width设置为wrap_content,并将它的width设置为50 dip,会发生什么情况? 最佳答案
这两个属性有什么关系?如果我有 android:noHistory="true",那么有 android:finishOnTaskLaunch="true" 有什么意义吗? 最佳答案 假设您的应用中有
我是新手,正在尝试理解以下 XML 代码: 查看 developer.android.com 上的文档,它说“starStyle”是 R.attr 中的常量, public static final
在下面的代码中,为什么当我设置时单选按钮的外观会发生变化 android:layout_width="fill_parent" 和 android:width="fill_parent" 我说的是
很难说出这里要问什么。这个问题模棱两可、含糊不清、不完整、过于宽泛或夸夸其谈,无法以目前的形式得到合理的回答。如需帮助澄清此问题以便重新打开,visit the help center . 关闭 9
假设我有一个函数 fun myFunction(name:String, email:String){},当我调用这个函数时 myFunction('Ali', 'ali@test.com ') 如何
我是一名优秀的程序员,十分优秀!