前言:抱着最起碼的要求盡力去做好每一件事 ! ——秋不白
本文適用:針對項目的相機多張拍攝,查看圖庫(自己寫的,查看自己拍攝的照片,不包含系統圖庫和其他文件夾的圖片),其實也是自己項目中不斷總結,爲什麼還要寫個自定義相機呢,因爲之前項目中寫的不夠好,拍照圖片的旋轉啊,現在離開公司了,總覺得還欠缺點什麼,如有需要可以聯繫我,代碼還沒有上傳github(後面我再放到gitbug),有興趣,請移步https://gitee.com/redrose/Demo,查看完整代碼。
我定義了Photo和classPhoto兩個java bean,快速開發就接入了LitePal,Glide,鴻洋大神的適配器,
圖庫效果截圖:
相機預覽界面
功能:重力傳感器監聽手機橫着豎着,(比如豎着拍攝的照片,查看的時候希望是橫着的,而不是豎着),動態修改相機參數,保存照片,以及加載圖片。
申請權限,權限要自己加了
前提:
1 自定義SurfaceView(還有GLSurfaceView,TextureView,使用SurfaceView,最簡單,畢竟是Google親兒子,都封裝好了)
2.Camera 工具類,(單利模式管理Camera對象,參數設置,釋放資源等)(封成工具類,方便後面自己用GLSurfaceView,TextureView去實現相機,以及後面接入openGL,,或者opencv 做人臉識別,識別人臉拍照等等)
Camera工具類
package com.redrose.videodemo.camera;
import android.graphics.ImageFormat;
import android.hardware.Camera;
import java.util.List;
/**
* Desc: 相機工具類
* author: RedRose
* Date: 2019/3/20
* Email: [email protected]
*/
public class CameraUtil {
private static CameraUtil mInstance;
/**
* 相機參數對象
*/
private Camera.Parameters mParameters;
/**
* 閃光燈自動
*/
public static final int FLASH_AUTO = 0;
/**
* 閃光燈關閉
*/
public static final int FLASH_OFF = 1;
/**
* 閃光燈開啓
*/
public static final int FLASH_ON = 2;
private CameraUtil() {
}
private static final Object o = new Object();
public static CameraUtil getInstance() {
if (mInstance == null) {
synchronized (o) {
if (mInstance == null) {
mInstance = new CameraUtil();
}
}
}
return mInstance;
}
private Camera mCamera;
public Camera openCamera() {
// 0 表示開啓後置相機
return openCamera(0);
}
public Camera openCamera(int id) {
if (mCamera == null) {
mCamera = Camera.open(id);
}
setProperty();
return mCamera;
}
/**
* 相機屬性設置
*/
private void setProperty() {
//設置相機預覽頁面旋轉90°,(默認是橫屏)
mCamera.setDisplayOrientation(90);
mParameters = mCamera.getParameters();
//設置將保存的圖片旋轉90°(豎着拍攝的時候)
mParameters.setRotation(90);
mParameters.setPreviewSize(1920, 1080);
mParameters.setPictureSize(1920, 1080);
// mParameters.setPictureSize(4608, 3456);
mParameters.setPictureFormat(ImageFormat.JPEG);
mParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
// mParameters.set(ImageFormat.YUV_444_888);
mCamera.setParameters(mParameters);
}
/**
* 選裝圖片的角度
*/
public void setRotateDegree(int degree) {
// boolean result = degree == 0 || degree == 90
// mParameters.setRotation(90);
if (mCamera != null) {
mParameters = mCamera.getParameters();
mParameters.setRotation(degree);
mCamera.setParameters(mParameters);
}
}
/**
* 獲取支持的預覽分辨率
*/
public List<Camera.Size> getPreviewSizeList() {
if (mCamera == null) {
throw new NullPointerException("Camera can not be null");
}
return mCamera.getParameters().getSupportedPreviewSizes();
}
/**
* 獲取保存圖片支持的分辨率
*/
public List<Camera.Size> getPictureSizeList() {
if (mCamera == null) {
throw new NullPointerException("Camera can not be null");
}
return mCamera.getParameters().getSupportedPictureSizes();
}
/**
* 設置閃光燈模式
*/
public void setFlashMode(int mode) {
mParameters = mCamera.getParameters();
String flashMode = mParameters.getFlashMode();
switch (mode) {
case FLASH_AUTO:
mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
break;
case FLASH_OFF:
mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
break;
case FLASH_ON:
mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_ON);
break;
default:
break;
}
mCamera.setParameters(mParameters);
}
/**
* 釋放相機資源
*/
public void releaseCamera() {
if (mCamera != null) {
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.lock();
mCamera.release();
mCamera = null;
isRelease = true;
}
}
/**
* 是否旋轉圖片 true 選裝
*/
private boolean isRelease = false;
public boolean getIsRelease() {
return isRelease;
}
/**
* 設置保存圖片的分辨率
*/
public void setSaveSize(Camera.Size saveSize) {
mParameters.setPictureSize(saveSize.width, saveSize.height);
mCamera.setParameters(mParameters);
}
}
自定義SurfaceView
package com.redrose.videodemo.camera;
import android.content.Context;
import android.hardware.Camera;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import com.redrose.videodemo.utils.BitmapCallBack;
import com.redrose.videodemo.utils.LogUtils;
import com.redrose.videodemo.utils.ToastUtil;
import com.redrose.videodemo.utils.ToolUtils;
import java.io.IOException;
/**
* Desc:
* Author: RedRose
* Date: 2019/3/20
* Email: [email protected]
*/
public class Preview extends SurfaceView implements SurfaceHolder.Callback, Camera.PreviewCallback, Camera.PictureCallback {
private Camera mCamera;
private BitmapCallBack mBitmapCallback;
private static final String TAG = Preview.class.getSimpleName();
public Preview(Context context) {
this(context, null);
}
public Preview(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public Preview(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
mCamera = CameraUtil.getInstance().openCamera();
SurfaceHolder holder = getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
LogUtils.e(TAG, " --surfaceCreated--");
try {
//這裏必須要這樣處理,比如鎖屏,回到桌面,再次回到相機的時候,surfaceCreated 會重新執行
//所以,要加個標識,判斷是否被釋放過資源
if (CameraUtil.getInstance().getIsRelease()) {
mCamera = CameraUtil.getInstance().openCamera();
}
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
e.printStackTrace();
}
mCamera.setPreviewCallback(this);
mCamera.startPreview();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
LogUtils.e(TAG, " --surfaceChanged--");
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
LogUtils.e(TAG, " --surfaceDestroyed--");
//每次 執行surfaceDestroyed,都要銷燬,釋放camera
CameraUtil.getInstance().releaseCamera();
}
/**
* 預覽回調
*/
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
}
/**
* 拍攝成功後回調
*/
@Override
public void onPictureTaken(byte[] data, Camera camera) {
if (mBitmapCallback != null) {
mBitmapCallback.backByte(data);
}
camera.startPreview();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
/**
* 觸摸聚焦
*/
mCamera.autoFocus(new Camera.AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
if (success) {
ToastUtil.show(getContext(), "聚焦成功");
camera.cancelAutoFocus();
}
}
});
return super.onTouchEvent(event);
}
public void takePhoto() {
mCamera.autoFocus(new Camera.AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
//設置聚焦成功後再拍照,其實可以不用。看需求吧,可以直接調用takePicture()
//有些手機會聚焦失敗,也就是success是false
if (success) {
ToastUtil.show(getContext(), "聚焦成功");
camera.cancelAutoFocus();
mCamera.takePicture(null, null, Preview.this);
}
}
});
}
/**
* 設置回調到Activity吧
*/
public void setBitmapCallback(BitmapCallBack callback) {
this.mBitmapCallback = callback;
}
}
public interface BitmapCallBack {
void backByte(byte[] data);
}
CamreaActivity
package com.redrose.videodemo.camera;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.hardware.Camera;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.OrientationHelper;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.TextView;
import com.redrose.videodemo.base.BaseActivity;
import org.litepal.crud.DataSupport;
import org.xutils.view.annotation.ContentView;
import org.xutils.view.annotation.Event;
import org.xutils.view.annotation.ViewInject;
import com.redrose.videodemo.R;
import com.redrose.videodemo.bean.Photo;
import com.redrose.videodemo.bean.Time;
import com.redrose.videodemo.utils.BitmapCallBack;
import com.redrose.videodemo.utils.GlideUtils;
import com.redrose.videodemo.utils.IntentUtils;
import com.redrose.videodemo.utils.LogUtils;
import com.redrose.videodemo.utils.MySensorHelper;
import com.redrose.videodemo.utils.SPUtils;
import com.redrose.videodemo.utils.ToastUtil;
import com.redrose.videodemo.utils.ToolUtils;
import com.zhy.adapter.recyclerview.CommonAdapter;
import com.zhy.adapter.recyclerview.base.ViewHolder;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
/**
* Desc:
* Author: RedRose
* Date: 2019/3/20
* Email: [email protected]
*/
@ContentView(R.layout.activity_camera)
public class CameraActivity extends BaseActivity implements BitmapCallBack {
@ViewInject(R.id.pre_text)
private TextView mPreSize;
@ViewInject(R.id.save_text)
private TextView mSaveSize;
@ViewInject(R.id.flashlight)
private ImageView mFlashView;
@ViewInject(R.id.photo_list)
private ImageView mPreImageView;
@ViewInject(R.id.take_photo)
private View mTakePhoto;
@ViewInject(R.id.camera_preview)
private Preview mPreview;
private boolean showLocation = false;
private PopupWindow mPopWindow;
private List<Photo> mPhotoList;
private Time mTime;
/**
* 是否旋轉圖片
* true 表示當前Activity 處於橫屏,false:當前處於豎屏
*/
private boolean mIsRotate = false;
/**
* 重力傳感器監聽
* 橫着 豎着狀態
*/
private MySensorHelper mMySensor;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initData();
}
private void initData() {
mMySensor = new MySensorHelper(this);
mMySensor.enable();
int mode = SPUtils.getInt("Flash_mode");
initFlashMode(mode);
mPreview.setBitmapCallback(this);
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
Calendar calendar = Calendar.getInstance();
String format = sdf.format(calendar.getTime());
mTime = new Time();
mTime.setClassId(Long.parseLong(format));
mTime.setDay(calendar.get(Calendar.DAY_OF_MONTH));
mTime.setYear(calendar.get(Calendar.YEAR));
mTime.setMonth(calendar.get(Calendar.MONTH) + 1);
mPhotoList = new ArrayList<>();
}
private void showPopWindow(View view) {
mPopWindow = new PopupWindow(view, ToolUtils.dp2px(mContext.getApplicationContext(),
200), ToolUtils.dp2px(mContext.getApplicationContext(), 200));
mPopWindow.setFocusable(true);
// popupWindow.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#3F51B5")));
mPopWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
mPopWindow.setOutsideTouchable(true);
mPopWindow.update();
if (showLocation) {
mPopWindow.showAsDropDown(mSaveSize);
} else {
mPopWindow.showAsDropDown(mPreSize);
}
}
/**
* 顯示支持保存的分辨率
*/
private void showSupportSize(List<Camera.Size> list) {
LayoutInflater inflater = LayoutInflater.from(mContext);
View view = inflater.inflate(R.layout.pop_size_layout, null);
RecyclerView recycleView = view.findViewById(R.id.recycle_size);
initRecycle(recycleView);
SizeAdapter mAdapter = new SizeAdapter(mContext, R.layout.size_item, list);
recycleView.setAdapter(mAdapter);
showPopWindow(view);
}
@Event(value = {R.id.pre_text, R.id.save_text, R.id.flashlight, R.id.take_photo, R.id.photo_list,
R.id.all_list})
private void onclickView(View view) {
int id = view.getId();
switch (id) {
/*暫時註釋 動態設置預覽分辨率*/
case R.id.pre_text:
/*預覽分辨率,建議設置成屏幕分辨率,經測試,支持的最高就是屏幕分辨率 */
showLocation = false;
showSupportSize(CameraUtil.getInstance().getPreviewSizeList());
break;
//設置保存圖片的分辨率
case R.id.save_text:
showLocation = true;
showSupportSize(CameraUtil.getInstance().getPictureSizeList());
break;
//切換閃光燈模式
case R.id.flashlight:
int mode = SPUtils.getInt("Flash_mode");
if (mode == CameraUtil.FLASH_AUTO) {
mode = CameraUtil.FLASH_OFF;
} else if (mode == CameraUtil.FLASH_OFF) {
mode = CameraUtil.FLASH_ON;
} else if (mode == CameraUtil.FLASH_ON) {
mode = CameraUtil.FLASH_AUTO;
}
SPUtils.put("Flash_mode", mode);
initFlashMode(mode);
break;
//拍照
case R.id.take_photo:
mPreview.takePhoto();
break;
//打開當前拍攝的照片圖庫
case R.id.photo_list:
int size = mPhotoList.size();
if (size == 0) {
ToastUtil.show(mContext, "還未拍攝照片,可以點擊右側查看所有照片");
return;
}
Bundle bundle = new Bundle();
bundle.putSerializable("photoList", (ArrayList<Photo>) mPhotoList);
IntentUtils.goToPreviewActivity(mContext, bundle);
break;
//打開圖庫
case R.id.all_list:
IntentUtils.goToImageActivity(mContext, null);
break;
default:
break;
}
}
private void initRecycle(RecyclerView recyclerView) {
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
//設置佈局管理器
recyclerView.setLayoutManager(layoutManager);
//設置爲垂直佈局,這也是默認的
layoutManager.setOrientation(OrientationHelper.VERTICAL);
//設置Adapter
// recyclerView.setAdapter(recycleAdapter);
//設置分隔線
// recyclerView.addItemDecoration(new DividerGridItemDecoration(this));
//設置增加或刪除條目的動畫
recyclerView.setItemAnimator(new DefaultItemAnimator());
}
@Override
public void backByte(byte[] data) {
GlideUtils.loadByte(mPreImageView, data);
ToolUtils.saveImageFile(data, mPhotoList, mIsRotate);
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
Calendar calendar = Calendar.getInstance();
String format = sdf.format(calendar.getTime());
List<Time> times = DataSupport.where("classId = ?", format).find(Time.class);
mTime.setPhotoList(mPhotoList);
if (times.size() == 0) {
mTime.save();
}
}
/**
* Desc: 相機頁面,拍攝照片保存分辨率 顯示適配器
* author: RedRose
* Date: 2019/4/1
* Email: [email protected]
*/
private class SizeAdapter extends CommonAdapter<Camera.Size> {
private SizeAdapter(Context context, int layoutId, List<Camera.Size> datas) {
super(context, layoutId, datas);
}
@Override
protected void convert(ViewHolder holder, Camera.Size size, int position) {
LogUtils.d("----redrose 裝載數據測試 ----");
TextView textView = holder.getView(R.id.size_text);
String sizeString = String.format("%d * % d", size.width, size.height);
textView.setText(sizeString);
if (showLocation) {
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
CameraUtil.getInstance().setSaveSize(size);
if (mPopWindow != null) {
mPopWindow.dismiss();
mPopWindow = null;
}
ToastUtil.show(mContext, size.width + "x" + size.height);
}
});
}
}
}
private void initFlashMode(int mode) {
if (mode == CameraUtil.FLASH_AUTO) {
mFlashView.setImageResource(R.mipmap.flash_auto);
} else if (mode == CameraUtil.FLASH_OFF) {
mFlashView.setImageResource(R.mipmap.flash_off);
} else if (mode == CameraUtil.FLASH_ON) {
mFlashView.setImageResource(R.mipmap.flash_on);
}
CameraUtil.getInstance().setFlashMode(mode);
}
@Override
protected void onDestroy() {
super.onDestroy();
mMySensor.disable();
LogUtils.e(TAG, " ---onDestroy---");
}
/**
* 是否旋轉圖片
*/
public void setIsRotate(boolean isRotate) {
if(mIsRotate == isRotate){
return;
}
this.mIsRotate = isRotate;
if (mIsRotate) {
CameraUtil.getInstance().setRotateDegree(0);
}else {
CameraUtil.getInstance().setRotateDegree(90);
}
}
public boolean getIsRotate(){
return mIsRotate;
}
}
重力監聽傳感器,判斷手機是橫着還是豎着
package com.redrose.videodemo.utils;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.util.Log;
import android.view.OrientationEventListener;
import com.redrose.videodemo.camera.CameraActivity;
import java.lang.ref.WeakReference;
/**
* Desc:
* 手機橫着豎着監聽
*
* @author: RedRose
* Date: 2019/4/2
* Email: [email protected]
*/
public class MySensorHelper {
private static final String TAG = MySensorHelper.class.getSimpleName();
private OrientationEventListener mLandOrientationListener;
private OrientationEventListener mPortOrientationListener;
private WeakReference<CameraActivity> mActivityWeakRef;
private boolean isPortLock = false;
private boolean isLandLock = false;
public MySensorHelper(final CameraActivity activity) {
this.mActivityWeakRef = new WeakReference(activity);
this.mLandOrientationListener = new OrientationEventListener(activity, 3) {
public void onOrientationChanged(int orientation) {
LogUtils.d(MySensorHelper.TAG, "mLandOrientationListener");
if (orientation < 100 && orientation > 80 || orientation < 280 && orientation > 260) {
LogUtils.e(MySensorHelper.TAG, "轉到了橫屏");
if (!MySensorHelper.this.isLandLock) {
CameraActivity mActivity = MySensorHelper.this.mActivityWeakRef.get();
if (mActivity != null) {
LogUtils.e(MySensorHelper.TAG, "轉到了橫屏##################");
/*mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
isLandLock=true;
isPortLock=false;*/
if (!mActivity.getIsRotate()) {
mActivity.setIsRotate(true);
}
}
}
}
}
};
this.mPortOrientationListener = new OrientationEventListener(activity, 3) {
public void onOrientationChanged(int orientation) {
LogUtils.d(MySensorHelper.TAG, "mPortOrientationListener");
if (orientation < 10 || orientation > 350 || orientation < 190 && orientation > 170) {
LogUtils.e(MySensorHelper.TAG, "轉到了豎屏");
if (!MySensorHelper.this.isPortLock) {
CameraActivity mActivity = MySensorHelper.this.mActivityWeakRef.get();
if (mActivity != null) {
LogUtils.e(MySensorHelper.TAG, "轉到了豎屏!!!!!!!!!!!!!!!!!!!!!!");
/*mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
isPortLock=true;
isLandLock=false*/
;
if (mActivity.getIsRotate()) {
mActivity.setIsRotate(false);
}
}
}
}
}
};
//this.disable();
}
//禁用切換屏幕的開關
public void disable() {
Log.e(TAG, "disable");
this.mPortOrientationListener.disable();
this.mLandOrientationListener.disable();
}
//開啓橫豎屏切換的開關
public void enable() {
this.mPortOrientationListener.enable();
this.mLandOrientationListener.enable();
}
//設置豎屏是否上鎖,true鎖定屏幕,fanle解鎖
public void setPortLock(boolean lockFlag) {
this.isPortLock = lockFlag;
}
//設置橫屏是否鎖定,true鎖定,false解鎖
public void setLandLock(boolean isLandLock) {
this.isLandLock = isLandLock;
}
}
依賴的jar
implementation 'com.android.support:recyclerview-v7:26+'
implementation 'org.xutils:xutils:3.3.36'
implementation 'com.zhy:base-adapter:3.0.3'
implementation 'com.zhy:base-rvadapter:3.0.3'
CameraActivity 佈局xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.redrose.videodemo.camera.Preview
android:id="@+id/camera_preview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<TextView
android:visibility="gone"
android:id="@+id/pre_text"
style="@style/camera_button_style"
android:text="預覽分辨率" />
<TextView
android:layout_marginEnd="10dp"
android:layout_alignParentEnd="true"
android:id="@+id/save_text"
style="@style/camera_button_style"
android:text="保存分辨率" />
<ImageView
android:layout_marginTop="20dp"
android:layout_centerHorizontal="true"
android:src="@mipmap/flash_on"
android:id="@+id/flashlight"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<View
android:id="@+id/take_photo"
android:layout_marginBottom="20dp"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:background="@drawable/take_photo_selector"
android:layout_width="56dp"
android:layout_height="56dp"/>
<ImageView
android:layout_alignParentBottom="true"
android:layout_marginStart="10dp"
android:layout_marginBottom="10dp"
android:src="@mipmap/ic_launcher"
android:id="@+id/photo_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:layout_marginEnd="10dp"
android:layout_marginBottom="10dp"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:src="@mipmap/ic_launcher"
android:id="@+id/all_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
共享參數工具類
/*
*
* Copyright 2016 YunDi
*
* The code is part of Yunnan, Shenzhen Branch of the internal architecture of YunDi source group
*
* DO NOT DIVULGE
*
*/
package com.redrose.videodemo.utils;
import android.content.Context;
import android.content.SharedPreferences;
import org.xutils.common.util.LogUtil;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;
public class SPUtils {
public static final String TAG = SPUtils.class.getSimpleName();
public static final String KEY_USER_INFO = "user_info";
private static Context mContext;
public static void init(Context context) {
mContext = context;
}
/**
* 保存在手機裏面的文件名
*/
public static final String FILE_NAME = "share_data";
/**
* 保存數據的方法,我們需要拿到保存數據的具體類型,然後根據類型調用不同的保存方法
*
* @param key
* @param object
*/
public static void put(String key, Object object) {
SharedPreferences sp = mContext.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
if (object instanceof String) {
editor.putString(key, (String) object);
} else if (object instanceof Integer) {
editor.putInt(key, (Integer) object);
} else if (object instanceof Boolean) {
editor.putBoolean(key, (Boolean) object);
} else if (object instanceof Float) {
editor.putFloat(key, (Float) object);
} else if (object instanceof Long) {
editor.putLong(key, (Long) object);
} else {
editor.putString(key, object.toString());
}
editor.commit();
}
public static String getString(String key) {
SharedPreferences sp = mContext.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
return sp.getString(key, null);
}
public static int getInt(String key) {
SharedPreferences sp = mContext.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
return sp.getInt(key, 0);
}
public static long getLong(String key) {
return (long) get(key, 0);
}
public static float getFloat(String key) {
return (float) get(key, 0f);
}
public static boolean getBoolean(String key) {
return (boolean) get(key, false);
}
/**
* 得到保存數據的方法,我們根據默認值得到保存的數據的具體類型,然後調用相對於的方法獲取值
*
* @param key
* @param defaultObject
* @return
*/
public static Object get(String key, Object defaultObject) {
SharedPreferences sp = mContext.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
if (defaultObject instanceof Integer) {
return sp.getInt(key, (Integer) defaultObject);
} else if (defaultObject instanceof Boolean) {
return sp.getBoolean(key, (Boolean) defaultObject);
} else if (defaultObject instanceof Float) {
return sp.getFloat(key, (Float) defaultObject);
} else if (defaultObject instanceof Long) {
return sp.getLong(key, (Long) defaultObject);
}
return null;
}
/**
* 移除某個key值已經對應的值
*
* @param key
*/
public static void remove(String key) {
SharedPreferences sp = mContext.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.remove(key);
SharedPreferencesCompat.apply(editor);
}
/**
* 清除所有數據
*/
public static void clear() {
SharedPreferences sp = mContext.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.clear();
SharedPreferencesCompat.apply(editor);
}
/**
* 查詢某個key是否已經存在
*
* @param key
* @return
*/
public static boolean contains(String key) {
SharedPreferences sp = mContext.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
return sp.contains(key);
}
/**
* 返回所有的鍵值對
*
* @return
*/
public static Map<String, ?> getAll() {
SharedPreferences sp = mContext.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
return sp.getAll();
}
/**
* 創建一個解決SharedPreferencesCompat.apply方法的一個兼容類
*/
private static class SharedPreferencesCompat {
private static final Method sApplyMethod = findApplyMethod();
/**
* 反射查找apply的方法
*
* @return
*/
@SuppressWarnings({"unchecked", "rawtypes"})
private static Method findApplyMethod() {
try {
Class clz = SharedPreferences.Editor.class;
return clz.getMethod("apply");
} catch (NoSuchMethodException e) {
}
return null;
}
/**
* 如果找到則使用apply執行,否則使用commit
*
* @param editor
*/
public static void apply(SharedPreferences.Editor editor) {
try {
if (sApplyMethod != null) {
sApplyMethod.invoke(editor);
return;
}
} catch (IllegalArgumentException e) {
} catch (IllegalAccessException e) {
} catch (InvocationTargetException e) {
}
editor.commit();
}
}
}
有的同學實現這個功能後,在打開系統圖庫的時候,看不見這張圖片,是因爲系統每次開機時會去檢索圖片等資源,把索引存到數據庫,所以要通知刷新媒體庫,要發廣播通知系統刷新(如何發,百度一大把,我就不贅述了)。
先就這麼多吧,最關鍵的就是自定義SurfaceView和CameraUtil 工具類。可以接着後面,繼續寫,實現更多的需求,我的目標是使用MediaCodeC錄製編碼小視頻和解碼,這部分還未完成。改天推到gitbub,就可以拉完整代碼了