android实现录屏小功能

本文实例为大家分享了android实现录屏小功能的具体代码,供大家参考,具体内容如下

思路

android实现录屏功能有两种方案,一种是直接使用android自带的MediaProjectionManager实现录屏功能,第二种是是只录语音,用户的操作通过某种方式进行记录保存,最后通过某种协议进行播放。

两种方案各有各的优缺点,前者实现方式简单,但无法只录制特定区域的画面,并且生成的视频文件一般都比较大。后者实现较为繁琐,音频录制android7.0之前没有暂停方法,只能生成多个文件,然后对音频进行合成。用户的操作需要自己进行保存,播放时还原。播放器需要自定义生成。但后者的好处是可扩展性高,支持特定区域录制,并且生成的音频文件比较小。

需求

录制画板,画板要求可以更改颜色粗细,可以擦除。画板底部可以是白板,图片。图片要求是相机拍摄或者本地图片。可以播放录制内容;需要上传,所以文件要小,所有只能选择第二种方式。

github地址

整个项目生成的是一个文件夹,文件夹中包含一个MP3文件,一个cw协议文件(存储用户的操作),图片。整个画板是一个recyclerView,item中包含一个涂鸦画板,图片控件。播放时读取cw协议文件,按照时间一个个绘制,协议内容包含画板各个页的内容是空白画板还是图片,时间点,操作(切换图片/画线)。

音频

//开始录音

if (mMediaRecorder == null) {

mMediaRecorder = new MediaRecorder();

}

mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);

mMediaRecorder.setOutputFile(mRecordFilePath);

mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//amr_nb格式头部有6个字节的头信息

try {

mMediaRecorder.prepare();

mMediaRecorder.start();

isRunning = true;

AudioUtil.startAudio();

mHandler.sendEmptyMessageDelayed(MSG_TYPE_COUNT_DOWN, 1000);

} catch (IOException e) {

e.printStackTrace();

}

/**

* 合成amr_nb编码的音频

* @param partsPaths

* @param unitedFilePath

*/

public static void uniteAMRFile(List<String> partsPaths, String unitedFilePath) {

try {

File unitedFile = new File(unitedFilePath);

FileOutputStream fos = new FileOutputStream(unitedFile);

RandomAccessFile ra = null;

for (int i = 0; i < partsPaths.size(); i++) {

ra = new RandomAccessFile(partsPaths.get(i), "rw");

if (i != 0) {

ra.seek(6);

}

byte[] buffer = new byte[1024 * 8];

int len = 0;

while ((len = ra.read(buffer)) != -1) {

fos.write(buffer,0,len);

}

File file = new File(partsPaths.get(i));

if(file.exists()){

file.delete();

}

}

if(ra!=null){

ra.close();

}

fos.close();

} catch (Exception e) {

e.printStackTrace();

}

}

音频播放

mediaPlayer = new MediaPlayer();

mediaPlayer.setDataSource(path);

mediaPlayer.prepare();

mediaPlayer.start();

recyclerView

是否禁止滑动

public class ForbitLayoutManager extends LinearLayoutManager {

private boolean canScrollHorizon = true;

private boolean canScrollVertical = true;

public ForbitLayoutManager(Context context) {

super(context);

}

public ForbitLayoutManager(Context context, int orientation, boolean reverseLayout) {

super(context, orientation, reverseLayout);

}

public ForbitLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {

super(context, attrs, defStyleAttr, defStyleRes);

}

public void setCanScrollHorizon(boolean canScrollHorizon) {

this.canScrollHorizon = canScrollHorizon;

}

public void setCanScrollVertical(boolean canScrollVertical) {

this.canScrollVertical = canScrollVertical;

}

@Override

public boolean canScrollHorizontally() {

return canScrollHorizon && super.canScrollHorizontally();

}

@Override

public boolean canScrollVertically() {

return canScrollVertical && super.canScrollVertically();

}

}

滑动时只滑动一页类似viewPage

mPagerSnapHelper = new PagerSnapHelper();

mPagerSnapHelper.attachToRecyclerView(recyclerView);

获得当前是第几页,类似viewPage的pageSelect

public class RecyclerViewPageChangeListenerHelper extends RecyclerView.OnScrollListener {

private SnapHelper snapHelper;

private OnPageChangeListener onPageChangeListener;

private int oldPosition = -1;//防止同一Position多次触发

public RecyclerViewPageChangeListenerHelper(SnapHelper snapHelper, OnPageChangeListener onPageChangeListener) {

this.snapHelper = snapHelper;

this.onPageChangeListener = onPageChangeListener;

}

@Override

public void onScrolled(RecyclerView recyclerView, int dx, int dy) {

super.onScrolled(recyclerView, dx, dy);

if (onPageChangeListener != null) {

onPageChangeListener.onScrolled(recyclerView, dx, dy);

}

}

@Override

public void onScrollStateChanged(RecyclerView recyclerView, int newState) {

super.onScrollStateChanged(recyclerView, newState);

int position = 0;

RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();

//获取当前选中的itemView

View view = snapHelper.findSnapView(layoutManager);

if (view != null) {

//获取itemView的position

position = layoutManager.getPosition(view);

}

if (onPageChangeListener != null) {

onPageChangeListener.onScrollStateChanged(recyclerView, newState);

//newState == RecyclerView.SCROLL_STATE_IDLE 当滚动停止时触发防止在滚动过程中不停触发

if (newState == RecyclerView.SCROLL_STATE_IDLE && oldPosition != position) {

oldPosition = position;

onPageChangeListener.onPageSelected(position);

}

}

}

public interface OnPageChangeListener {

void onScrollStateChanged(RecyclerView recyclerView, int newState);

void onScrolled(RecyclerView recyclerView, int dx, int dy);

void onPageSelected(int position);

}

}

获得当前选择的item(只能获得可视页面item)

View view = forbitLayoutManager.findViewByPosition(position);

//有时会获取到null,是因为页面还没有渲染完成,可以使用

recyclerView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver

.OnGlobalLayoutListener() {

@Override

public void onGlobalLayout() {

//会多次调用,执行完逻辑之后取消监听

recyclerView.getViewTreeObserver().removeOnGlobalLayoutListener(this);

}

});

根据时间进行播放

private void convertCWACT(CW cw, int seconds,boolean isSeek) {

List<CWACT> cwacts = cw.getACT();

//如何是播放器跳转,先回到首页,清空所有item中的画板,防止从高时间跳转到低时间出现错误

if(isSeek){

position =0;

forbitLayoutManager.scrollToPosition(position);

forbitLayoutManager.setStackFromEnd(true);

for(int i=0;i<recyclerViewList.size();i++){

View view = recyclerViewList.get(i);

if(view!=null){

SimpleDoodleView doodleView = view.findViewById(R.id.doodleView);

doodleView.clear();

}

}

}

for (CWACT cwact : cwacts) {

int time = cwact.getTime();

if(isSeek?time > seconds:time != seconds){

continue;

}

if ("switch".equals(cwact.getAction())) {//切换页面

position = cwact.getCwSwitch().getIndex();

forbitLayoutManager.scrollToPosition(position);

forbitLayoutManager.setStackFromEnd(true);

} else if ("line".equals(cwact.getAction())) {//划线

if(position>recyclerViewList.size()-1){

continue;

}

View view = recyclerViewList.get(position);

if(view!=null){

SimpleDoodleView doodleView = view.findViewById(R.id.doodleView);

doodleView.setDrawPath(cwact.getLine());

}

} else if ("clear".equals(cwact.getAction())) {//清屏

if(position>recyclerViewList.size()-1){

continue;

}

View view = recyclerViewList.get(position);

if(view!=null){

SimpleDoodleView doodleView = view.findViewById(R.id.doodleView);

doodleView.clear();

}

}

}

}

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。

以上是 android实现录屏小功能 的全部内容, 来源链接: utcz.com/p/242339.html

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