Android Camera 拍照 三星BUG总结

时间：2024-05-25 13:35:50

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;

	}

}

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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;

	}

}

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