Android(安卓)Camera 拍照 三星BUG总结
16lz
2022-06-29
Android Camera 三星BUG :
最近在Android项目中使用拍照功能 , 其它型号的手机运行成功了 唯独在三星的相机上遇到了bug .
BUG具体体现为 :
(1) 摄像头拍照后图片数据不一定能返回 ; onActivityResult的data为空
(2) 三星的camera强制切换到横屏 导致Activity重启生命周期 (但是部分机型 配置 android:configChanges 也不能阻止横竖屏切换);
我的解决方法为
如果 activity 的销毁如果无法避免 那么在activity销毁之前调用onSaveInstanceState 保存图片的路径
当activity重新创建的时候 会将onSaveInstanceState 保存的文件传递给onCreate()当中
在onCreate当中 检查照片的地址是否存在文件 以此来判定拍照是否成功
运气不错 终于通过了测试同学们的验证.....
我的代码如下:
配置 Androidmanifest.xml 中的配置 activity
<activity android:name=".UseCameraActivity" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|navigation" android:launchMode="singleTop" android:screenOrientation="portrait" />
增加权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
贴上代码:
1) 主activity
功能是: 根据指定的路径 生成bitmap ; 显示图片
package com.example.camerabaozi;import java.io.File;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import android.app.Activity;import android.content.ContentResolver;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;import com.nostra13.universalimageloader.core.ImageLoader;/** * 启动界面 * * 照片生成的目录在 sd卡的/a/image/camera/.. .jpg * * @author baozi * */public class MainActivity extends Activity {protected static final int REQCAMERA = 11;private static final String TAG = "MainActivity";private View button1;private ImageView photo_iv;private ContentResolver mContentResolver;final int IMAGE_MAX_SIZE = 1024;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mContentResolver = getContentResolver();button1 = (Button) findViewById(R.id.button1);button1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(MainActivity.this,UseCameraActivity.class);startActivityForResult(intent, REQCAMERA);}});photo_iv = (ImageView) findViewById(R.id.imageView1);}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {switch (requestCode) {case REQCAMERA:String path = data.getStringExtra(UseCameraActivity.IMAGE_PATH);Log.i("123", path);// 根据照片的位置获取图片Bitmap bitmap = getBitmap(path);photo_iv.setImageBitmap(bitmap);// ImageLoader.getInstance().displayImage(// getImageUri(path).toString(), photo_iv);break;default:super.onActivityResult(requestCode, resultCode, data);break;}}private Uri getImageUri(String path) {return Uri.fromFile(new File(path));}private Bitmap getBitmap(String path) {Uri uri = getImageUri(path);InputStream in = null;try {in = mContentResolver.openInputStream(uri);// Decode image sizeBitmapFactory.Options o = new BitmapFactory.Options();o.inJustDecodeBounds = true;BitmapFactory.decodeStream(in, null, o);in.close();int scale = 1;if (o.outHeight > IMAGE_MAX_SIZE || o.outWidth > IMAGE_MAX_SIZE) {scale = (int) Math.pow(2,(int) Math.round(Math.log(IMAGE_MAX_SIZE/ (double) Math.max(o.outHeight, o.outWidth))/ Math.log(0.5)));}BitmapFactory.Options o2 = new BitmapFactory.Options();o2.inSampleSize = scale;in = mContentResolver.openInputStream(uri);Bitmap b = BitmapFactory.decodeStream(in, null, o2);in.close();return b;} catch (FileNotFoundException e) {Log.e(TAG, "file " + path + " not found");} catch (IOException e) {Log.e(TAG, "file " + path + " not found");}return null;}}// ┏┓ ┏┓// ┏┛┻━━━┛┻┓// ┃ ┃ // ┃ ━ ┃// ┃ ┳┛ ┗┳ ┃// ┃ ┃// ┃ ┻ ┃// ┃ ┃// ┗━┓ ┏━┛// ┃ ┃ 神兽保佑 // ┃ ┃ 代码无BUG！// ┃ ┗━━━┓// ┃ ┣┓// ┃ ┏┛// ┗┓┓┏━┳┓┏┛// ┃┫┫ ┃┫┫// ┗┻┛ ┗┻┛ 2) UseCameraActivity.java
本类的功能是调用 生成图片拍摄后的路径
照片生成的目录在 sd卡的/a/image/camera/.. .jpg
package com.example.camerabaozi;import java.io.File;import java.io.IOException;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.content.res.Configuration;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.util.Log;/** * 照片生成的目录在 sd卡的/a/image/camera/.. .jpg * * @author baozi * */public class UseCameraActivity extends Activity {private String mImageFilePath;public static final String IMAGEFILEPATH = "ImageFilePath";public final static String IMAGE_PATH = "image_path";static Activity mContext;public final static int GET_IMAGE_REQ = 5000;private static Context applicationContext;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//判断 activity被销毁后 有没有数据被保存下来if (savedInstanceState != null) {mImageFilePath = savedInstanceState.getString(IMAGEFILEPATH);Log.i("123---savedInstanceState", mImageFilePath);File mFile = new File(IMAGEFILEPATH);if (mFile.exists()) {Intent rsl = new Intent();rsl.putExtra(IMAGE_PATH, mImageFilePath);setResult(Activity.RESULT_OK, rsl);Log.i("123---savedInstanceState", "图片拍摄成功");finish();} else {Log.i("123---savedInstanceState", "图片拍摄失败");}}mContext = this;applicationContext = getApplicationContext();if (savedInstanceState == null) {initialUI();}}public void initialUI() {//根据时间生成 后缀为 .jpg 的图片long ts = System.currentTimeMillis();mImageFilePath = getCameraPath() + ts + ".jpg";File out = new File(mImageFilePath);showCamera(out);}private void showCamera(File out) {Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(out)); // setstartActivityForResult(intent, GET_IMAGE_REQ);}@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent intent) {if (GET_IMAGE_REQ == requestCode && resultCode == Activity.RESULT_OK) {Intent rsl = new Intent();rsl.putExtra(IMAGE_PATH, mImageFilePath);mContext.setResult(Activity.RESULT_OK, rsl);mContext.finish();} else {mContext.finish();}}@Overrideprotected void onDestroy() {super.onDestroy();}@Overrideprotected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);outState.putString("ImageFilePath", mImageFilePath + "");}@Overridepublic void onConfigurationChanged(Configuration newConfig) {super.onConfigurationChanged(newConfig);}@Overrideprotected void onRestoreInstanceState(Bundle savedInstanceState) {super.onRestoreInstanceState(savedInstanceState);}public static String getCameraPath() {String filePath = getImageRootPath() + "/camera/";File file = new File(filePath);if (!file.isDirectory()) {file.mkdirs();}file = null;return filePath;}public static String getImageRootPath() {String filePath = getAppRootPath() + "/image";File file = new File(filePath);if (!file.exists()) {file.mkdirs();}file = null;return filePath;}public static String getAppRootPath() {String filePath = "/a";if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {filePath = Environment.getExternalStorageDirectory() + filePath;} else {filePath = applicationContext.getCacheDir() + filePath;}File file = new File(filePath);if (!file.exists()) {file.mkdirs();}file = null;File nomedia = new File(filePath + "/.nomedia");if (!nomedia.exists())try {nomedia.createNewFile();} catch (IOException e) {}return filePath;}}//┏┓ ┏┓//┏┛┻━━━┛┻┓//┃ ┃ //┃ ━ ┃//┃ ┳┛ ┗┳ ┃//┃ ┃//┃ ┻ ┃//┃ ┃//┗━┓ ┏━┛//┃ ┃ 神兽保佑 //┃ ┃ 代码无BUG！//┃ ┗━━━┓//┃ ┣┓//┃ ┏┛//┗┓┓┏━┳┓┏┛// ┃┫┫ ┃┫┫// ┗┻┛ ┗┻┛ Demo 下载地址: http://download.csdn.net/detail/aaawqqq/7653475
祝福大家每日精进
谢谢
更多相关文章
- Android(安卓)matrix 控制图片的旋转、缩放、移动
- android拍照与读取相册
- Android(安卓)报错：Caused by: android.os.FileUriExposedExcepti
- Android(安卓)命令行编译、打包生成apk文件
- android解决坚屏拍照和保存图片旋转90度的问题，并兼容4.0
- [Android]在App中使用相机
- Android(OpenCV) NDK开发: 0xdeadbaad(code=1)错误 及 关闭armea
- android WebView 图片缩放功能小结
- Android(安卓)主流图片库Picasso Glide Fresco对比分析