因?yàn)锳ndroid沒(méi)有對(duì)應(yīng)的截圖APi,所以只能去監(jiān)聽(tīng)截圖文件夾中的文件數(shù)量是否發(fā)生改變,以此來(lái)判斷是否進(jìn)行了截圖
不同的Rom中存放截圖的文件夾不一樣,但是都會(huì)包含screen或者shot等關(guān)鍵字
/**
* 截屏依據(jù)中的路徑判斷關(guān)鍵字
*/
private static final String[] KEYWORDS = {
"screenshot", "screen_shot", "screen-shot", "screen shot",
"screencapture", "screen_capture", "screen-capture", "screen capture",
"screencap", "screen_cap", "screen-cap", "screen cap"
};
創(chuàng)建一個(gè)媒體文件觀察者來(lái)監(jiān)聽(tīng)文件的變化
/**
* 媒體內(nèi)容觀察者(觀察媒體數(shù)據(jù)庫(kù)的改變)
*/
private class MediaContentObserver extends ContentObserver {
private Uri mContentUri;
public MediaContentObserver(Uri contentUri, Handler handler) {
super(handler);
mContentUri = contentUri;
}
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
handleMediaContentChange(mContentUri);
}
}
處理媒體數(shù)據(jù)庫(kù)的改變
/**
* 處理媒體數(shù)據(jù)庫(kù)的內(nèi)容改變
*/
private void handleMediaContentChange(Uri contentUri) {
Cursor cursor = null;
try {
// 數(shù)據(jù)改變時(shí)查詢數(shù)據(jù)庫(kù)中最后加入的一條數(shù)據(jù)
cursor = mContext.getContentResolver().query(
contentUri,
Build.VERSION.SDK_INT < 16 ? MEDIA_PROJECTIONS : MEDIA_PROJECTIONS_API_16,
null,
null,
MediaStore.Images.ImageColumns.DATE_ADDED + " desc limit 1"
);
if (cursor == null) {
Log.i("ScreenShot","ScreenSize cursor null");
return;
}
if (!cursor.moveToFirst()) {
Log.i("ScreenShot","ScreenSize not move first");
return;
}
// 獲取各列的索引
int dataIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
int dateTakenIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATE_TAKEN);
int widthIndex = -1;
int heightIndex = -1;
if (Build.VERSION.SDK_INT >= 16) {
widthIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.WIDTH);
heightIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.HEIGHT);
}
// 獲取行數(shù)據(jù)
String data = cursor.getString(dataIndex);
long dateTaken = cursor.getLong(dateTakenIndex);
int width = 0;
int height = 0;
if (widthIndex >= 0 && heightIndex >= 0) {
width = cursor.getInt(widthIndex);
height = cursor.getInt(heightIndex);
} else {
// API 16 之前, 寬高要手動(dòng)獲取
Point size = getImageSize(data);
width = size.x;
height = size.y;
}
// 處理獲取到的第一行數(shù)據(jù)
handleMediaRowData(data, dateTaken, width, height);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
}
}
拿到對(duì)應(yīng)的圖片之后需要去檢查是否符合標(biāo)準(zhǔn)
/**
* 判斷指定的數(shù)據(jù)行是否符合截屏條件
*/
private boolean checkScreenShot(String data, long dateTaken, int width, int height) {
/*
* 判斷依據(jù)一: 時(shí)間判斷
*/
// 如果加入數(shù)據(jù)庫(kù)的時(shí)間在開(kāi)始監(jiān)聽(tīng)之前, 或者與當(dāng)前時(shí)間相差大于10秒, 則認(rèn)為當(dāng)前沒(méi)有截屏
if (dateTaken < mStartListenTime || (System.currentTimeMillis() - dateTaken) > 10 * 1000) {
return false;
}
/*
* 判斷依據(jù)二: 尺寸判斷
*/
if (sScreenRealSize != null) {
// 如果圖片尺寸超出屏幕, 則認(rèn)為當(dāng)前沒(méi)有截屏
if (!((width <= sScreenRealSize.x && height <= sScreenRealSize.y)
|| (height <= sScreenRealSize.x && width <= sScreenRealSize.y))) {
return false;
}
}
/*
* 判斷依據(jù)三: 路徑判斷
*/
if (TextUtils.isEmpty(data)) {
return false;
}
data = data.toLowerCase();
// 判斷圖片路徑是否含有指定的關(guān)鍵字之一, 如果有, 則認(rèn)為當(dāng)前截屏了
for (String keyWork : KEYWORDS) {
if (data.contains(keyWork)) {
return true;
}
}
return false;
}
創(chuàng)建一個(gè)供外部使用的對(duì)象,來(lái)開(kāi)啟和結(jié)束監(jiān)聽(tīng)
private ScreenShotListenManager(Context context) {
if (context == null) {
throw new IllegalArgumentException("The context must not be null.");
}
mContext = context;
// 獲取屏幕真實(shí)的分辨率
if (sScreenRealSize == null) {
sScreenRealSize = getRealScreenSize();
if (sScreenRealSize != null) {
Log.i("ScreenShot","ScreenSize");
} else {
Log.i("ScreenShot","ScreenSize is null");
}
}
}
public static ScreenShotListenManager newInstance(Context context) {
assertInMainThread();
return new ScreenShotListenManager(context);
}
/**
* 啟動(dòng)監(jiān)聽(tīng)
*/
public void startListen() {
assertInMainThread();
sHasCallbackPaths.clear();
// 記錄開(kāi)始監(jiān)聽(tīng)的時(shí)間戳
mStartListenTime = System.currentTimeMillis();
// 創(chuàng)建內(nèi)容觀察者
mInternalObserver = new MediaContentObserver(MediaStore.Images.Media.INTERNAL_CONTENT_URI, mUiHandler);
mExternalObserver = new MediaContentObserver(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, mUiHandler);
// 注冊(cè)內(nèi)容觀察者
mContext.getContentResolver().registerContentObserver(
MediaStore.Images.Media.INTERNAL_CONTENT_URI,
false,
mInternalObserver
);
mContext.getContentResolver().registerContentObserver(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
false,
mExternalObserver
);
}
/**
* 停止監(jiān)聽(tīng)
*/
public void stopListen() {
assertInMainThread();
// 注銷(xiāo)內(nèi)容觀察者
if (mInternalObserver != null) {
try {
mContext.getContentResolver().unregisterContentObserver(mInternalObserver);
} catch (Exception e) {
e.printStackTrace();
}
mInternalObserver = null;
}
if (mExternalObserver != null) {
try {
mContext.getContentResolver().unregisterContentObserver(mExternalObserver);
} catch (Exception e) {
e.printStackTrace();
}
mExternalObserver = null;
}
// 清空數(shù)據(jù)
mStartListenTime = 0;
sHasCallbackPaths.clear();
}
然后在外部文件中使用
screenShotListenManager = ScreenShotListenManager.newInstance(this);
screenShotListenManager.setListener(new ScreenShotListenManager.OnScreenShotListener() {
@Override
public void onShot(String imagePath) {
//具體截圖進(jìn)行的操作
}
}
});
screenShotListenManager.startListen();
在onDestory方法中調(diào)用 screenShotListenManager.stopListen()
附上整個(gè)監(jiān)聽(tīng)類(lèi):
public class ScreenShotListenManager {
//讀取媒體數(shù)據(jù)庫(kù)時(shí)需要讀取的列
private static final String[] MEDIA_PROJECTIONS = {
MediaStore.Images.ImageColumns.DATA, MediaStore.Images.ImageColumns.DATE_TAKEN,
};
private static final String[] MEDIA_PROJECTIONS_API_16 = {
MediaStore.Images.ImageColumns.DATA,
MediaStore.Images.ImageColumns.DATE_TAKEN,
MediaStore.Images.ImageColumns.WIDTH,
MediaStore.Images.ImageColumns.HEIGHT,
};
/**
* 截屏依據(jù)中的路徑判斷關(guān)鍵字
*/
private static final String[] KEYWORDS = {
"screenshot", "screen_shot", "screen-shot", "screen shot",
"screencapture", "screen_capture", "screen-capture", "screen capture",
"screencap", "screen_cap", "screen-cap", "screen cap"
};
private static Point sScreenRealSize;
/**
* 已回調(diào)過(guò)的路徑
*/
private final List<String> sHasCallbackPaths = new ArrayList<String>();
private Context mContext;
private OnScreenShotListener mListener;
private long mStartListenTime;
/**
* 內(nèi)部存儲(chǔ)器內(nèi)容觀察者
*/
private MediaContentObserver mInternalObserver;
/**
* 外部存儲(chǔ)器內(nèi)容觀察者
*/
private MediaContentObserver mExternalObserver;
/**
* 運(yùn)行在 UI 線程的 Handler, 用于運(yùn)行監(jiān)聽(tīng)器回調(diào)
*/
private final Handler mUiHandler = new Handler(Looper.getMainLooper());
private ScreenShotListenManager(Context context) {
if (context == null) {
throw new IllegalArgumentException("The context must not be null.");
}
mContext = context;
// 獲取屏幕真實(shí)的分辨率
if (sScreenRealSize == null) {
sScreenRealSize = getRealScreenSize();
if (sScreenRealSize != null) {
Log.i("ScreenShot","ScreenSize");
} else {
Log.i("ScreenShot","ScreenSize is null");
}
}
}
public static ScreenShotListenManager newInstance(Context context) {
assertInMainThread();
return new ScreenShotListenManager(context);
}
/**
* 啟動(dòng)監(jiān)聽(tīng)
*/
public void startListen() {
assertInMainThread();
sHasCallbackPaths.clear();
// 記錄開(kāi)始監(jiān)聽(tīng)的時(shí)間戳
mStartListenTime = System.currentTimeMillis();
// 創(chuàng)建內(nèi)容觀察者
mInternalObserver = new MediaContentObserver(MediaStore.Images.Media.INTERNAL_CONTENT_URI, mUiHandler);
mExternalObserver = new MediaContentObserver(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, mUiHandler);
// 注冊(cè)內(nèi)容觀察者
mContext.getContentResolver().registerContentObserver(
MediaStore.Images.Media.INTERNAL_CONTENT_URI,
false,
mInternalObserver
);
mContext.getContentResolver().registerContentObserver(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
false,
mExternalObserver
);
}
/**
* 停止監(jiān)聽(tīng)
*/
public void stopListen() {
assertInMainThread();
// 注銷(xiāo)內(nèi)容觀察者
if (mInternalObserver != null) {
try {
mContext.getContentResolver().unregisterContentObserver(mInternalObserver);
} catch (Exception e) {
e.printStackTrace();
}
mInternalObserver = null;
}
if (mExternalObserver != null) {
try {
mContext.getContentResolver().unregisterContentObserver(mExternalObserver);
} catch (Exception e) {
e.printStackTrace();
}
mExternalObserver = null;
}
// 清空數(shù)據(jù)
mStartListenTime = 0;
sHasCallbackPaths.clear();
}
/**
* 處理媒體數(shù)據(jù)庫(kù)的內(nèi)容改變
*/
private void handleMediaContentChange(Uri contentUri) {
Cursor cursor = null;
try {
// 數(shù)據(jù)改變時(shí)查詢數(shù)據(jù)庫(kù)中最后加入的一條數(shù)據(jù)
cursor = mContext.getContentResolver().query(
contentUri,
Build.VERSION.SDK_INT < 16 ? MEDIA_PROJECTIONS : MEDIA_PROJECTIONS_API_16,
null,
null,
MediaStore.Images.ImageColumns.DATE_ADDED + " desc limit 1"
);
if (cursor == null) {
Log.i("ScreenShot","ScreenSize cursor null");
return;
}
if (!cursor.moveToFirst()) {
Log.i("ScreenShot","ScreenSize not move first");
return;
}
// 獲取各列的索引
int dataIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
int dateTakenIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATE_TAKEN);
int widthIndex = -1;
int heightIndex = -1;
if (Build.VERSION.SDK_INT >= 16) {
widthIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.WIDTH);
heightIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.HEIGHT);
}
// 獲取行數(shù)據(jù)
String data = cursor.getString(dataIndex);
long dateTaken = cursor.getLong(dateTakenIndex);
int width = 0;
int height = 0;
if (widthIndex >= 0 && heightIndex >= 0) {
width = cursor.getInt(widthIndex);
height = cursor.getInt(heightIndex);
} else {
// API 16 之前, 寬高要手動(dòng)獲取
Point size = getImageSize(data);
width = size.x;
height = size.y;
}
// 處理獲取到的第一行數(shù)據(jù)
handleMediaRowData(data, dateTaken, width, height);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
}
}
private Point getImageSize(String imagePath) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(imagePath, options);
return new Point(options.outWidth, options.outHeight);
}
/**
* 處理獲取到的一行數(shù)據(jù)
*/
private void handleMediaRowData(String data, long dateTaken, int width, int height) {
if (checkScreenShot(data, dateTaken, width, height)) {
if (mListener != null && !checkCallback(data)) {
mListener.onShot(data);
}
} else {
// 如果在觀察區(qū)間媒體數(shù)據(jù)庫(kù)有數(shù)據(jù)改變，又不符合截屏規(guī)則，則輸出到 log 待分析
Log.i("ScreenShot","Not current ScreenShot ");
}
}
/**
* 判斷指定的數(shù)據(jù)行是否符合截屏條件
*/
private boolean checkScreenShot(String data, long dateTaken, int width, int height) {
/*
* 判斷依據(jù)一: 時(shí)間判斷
*/
// 如果加入數(shù)據(jù)庫(kù)的時(shí)間在開(kāi)始監(jiān)聽(tīng)之前, 或者與當(dāng)前時(shí)間相差大于10秒, 則認(rèn)為當(dāng)前沒(méi)有截屏
if (dateTaken < mStartListenTime || (System.currentTimeMillis() - dateTaken) > 10 * 1000) {
return false;
}
/*
* 判斷依據(jù)二: 尺寸判斷
*/
if (sScreenRealSize != null) {
// 如果圖片尺寸超出屏幕, 則認(rèn)為當(dāng)前沒(méi)有截屏
if (!((width <= sScreenRealSize.x && height <= sScreenRealSize.y)
|| (height <= sScreenRealSize.x && width <= sScreenRealSize.y))) {
return false;
}
}
/*
* 判斷依據(jù)三: 路徑判斷
*/
if (TextUtils.isEmpty(data)) {
return false;
}
data = data.toLowerCase();
// 判斷圖片路徑是否含有指定的關(guān)鍵字之一, 如果有, 則認(rèn)為當(dāng)前截屏了
for (String keyWork : KEYWORDS) {
if (data.contains(keyWork)) {
return true;
}
}
return false;
}
/**
* 判斷是否已回調(diào)過(guò), 某些手機(jī)ROM截屏一次會(huì)發(fā)出多次內(nèi)容改變的通知; <br/>
* 刪除一個(gè)圖片也會(huì)發(fā)通知, 同時(shí)防止刪除圖片時(shí)誤將上一張符合截屏規(guī)則的圖片當(dāng)做是當(dāng)前截屏.
*/
private boolean checkCallback(String imagePath) {
if (sHasCallbackPaths.contains(imagePath)) {
return true;
}
// 大概緩存15~20條記錄便可
if (sHasCallbackPaths.size() >= 20) {
for (int i = 0; i < 5; i++) {
sHasCallbackPaths.remove(0);
}
}
sHasCallbackPaths.add(imagePath);
return false;
}
/**
* 獲取屏幕分辨率
*/
private Point getRealScreenSize() {
Point screenSize = null;
try {
screenSize = new Point();
WindowManager windowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
Display defaultDisplay = windowManager.getDefaultDisplay();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
defaultDisplay.getRealSize(screenSize);
} else {
try {
Method mGetRawW = Display.class.getMethod("getRawWidth");
Method mGetRawH = Display.class.getMethod("getRawHeight");
screenSize.set(
(Integer) mGetRawW.invoke(defaultDisplay),
(Integer) mGetRawH.invoke(defaultDisplay)
);
} catch (Exception e) {
screenSize.set(defaultDisplay.getWidth(), defaultDisplay.getHeight());
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return screenSize;
}
/**
* 設(shè)置截屏監(jiān)聽(tīng)器
*/
public void setListener(OnScreenShotListener listener) {
mListener = listener;
}
public static interface OnScreenShotListener {
public void onShot(String imagePath);
}
private static void assertInMainThread() {
if (Looper.myLooper() != Looper.getMainLooper()) {
StackTraceElement[] elements = Thread.currentThread().getStackTrace();
String methodMsg = null;
if (elements != null && elements.length >= 4) {
methodMsg = elements[3].toString();
}
throw new IllegalStateException("Call the method must be in main thread: " + methodMsg);
}
}
/**
* 媒體內(nèi)容觀察者(觀察媒體數(shù)據(jù)庫(kù)的改變)
*/
private class MediaContentObserver extends ContentObserver {
private Uri mContentUri;
public MediaContentObserver(Uri contentUri, Handler handler) {
super(handler);
mContentUri = contentUri;
}
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
handleMediaContentChange(mContentUri);
}
}
}
