Android Camera 三星BUG :
近期在Android项目中使用拍照功能 , 其他型号的手机执行成功了 只有在三星的相机上遇到了bug .
BUG详细体现为 :
(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重新启动生命周期 (可是部分机型 配置 android:configChanges 也不能阻止横竖屏切换);
我的解决方法为
假设 activity 的销毁假设无法避免 那么在activity销毁之前调用 onSaveInstanceState 保存图片的路径
当activity又一次创建的时候 会将 onSaveInstanceState 保存的文件传递给onCreate()其中
在onCreate其中 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 最终通过了測试同学们的验证.....
我的代码例如以下:
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" />
添加权限:
<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: 依据指定的路径 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
*
* 照片生成的文件夹在 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;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContentResolver = getContentResolver();
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,
UseCameraActivity.class);
startActivityForResult(intent, REQCAMERA);
}
});
photo_iv = (ImageView) findViewById(R.id.imageView1);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQCAMERA:
String path = data.getStringExtra(UseCameraActivity.IMAGE_PATH);
Log.i("123", path);
// 依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 size
BitmapFactory.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
照片生成的文件夹在 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;
/**
* 照片生成的文件夹在 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;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//推断 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() {
//依据时间生成 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)); // set
startActivityForResult(intent, GET_IMAGE_REQ);
}
@Override
public 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();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("ImageFilePath", mImageFilePath + "");
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
@Override
protected 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:
祝福大家每日精进
谢谢
Android Camera 三星BUG :
近期在Android项目中使用拍照功能 , 其他型号的手机执行成功了 只有在三星的相机上遇到了bug .
BUG详细体现为 :
(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重新启动生命周期 (可是部分机型 配置 android:configChanges 也不能阻止横竖屏切换);
我的解决方法为
假设 activity 的销毁假设无法避免 那么在activity销毁之前调用 onSaveInstanceState 保存图片的路径
当activity又一次创建的时候 会将 onSaveInstanceState 保存的文件传递给onCreate()其中
在onCreate其中 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 最终通过了測试同学们的验证.....
我的代码例如以下:
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" />
添加权限:
<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: 依据指定的路径 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
*
* 照片生成的文件夹在 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;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContentResolver = getContentResolver();
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,
UseCameraActivity.class);
startActivityForResult(intent, REQCAMERA);
}
});
photo_iv = (ImageView) findViewById(R.id.imageView1);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQCAMERA:
String path = data.getStringExtra(UseCameraActivity.IMAGE_PATH);
Log.i("123", path);
// 依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 size
BitmapFactory.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
照片生成的文件夹在 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;
/**
* 照片生成的文件夹在 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;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//推断 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() {
//依据时间生成 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)); // set
startActivityForResult(intent, GET_IMAGE_REQ);
}
@Override
public 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();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("ImageFilePath", mImageFilePath + "");
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
@Override
protected 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。
//┃ ┗━━━┓
//┃ ┣┓
//┃ ┏┛
//┗┓┓┏━┳┓┏┛
// ┃┫┫ ┃┫┫
// ┗┻┛ ┗┻┛