android 录像和拍照功能

先在 manifest 里添加权限

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

复制代码 layout 布局预览窗口 camera.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<SurfaceView
android:id="@+id/arc_hf_video_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<TextView
android:id="@+id/arc_hf_video_timer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="40dp"
android:textColor="#ffff0000"
android:textSize="35dp"
android:textStyle="bold" >
</TextView>
<LinearLayout
android:id="@+id/arc_hf_video_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:gravity="center"
android:orientation="vertical" >
<Button
android:id="@+id/arc_hf_video_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/arc_hf_btn_video_start" />
<Button
android:id="@+id/arc_hf_img_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/arc_hf_btn_img" />
</LinearLayout>
</RelativeLayout>

复制代码主Activity MCamera.java

public class MCamera extends Activity {
private Button mVideoStartBtn;
private SurfaceView mSurfaceview;
private MediaRecorder mMediaRecorder;
private SurfaceHolder mSurfaceHolder;
private File mRecVedioPath;
private File mRecAudioFile;
private TextView timer;
private int hour = 0;
private int minute = 0;
private int second = 0;
private boolean bool;
private int parentId;
protected Camera camera;
protected boolean isPreview;
private Drawable iconStart;
private Drawable iconStop;
private boolean isRecording = true; // true表示没有录像，点击开始；false表示正在录像，点击暂停
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/*
* 全屏显示
*/
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
setContentView(R.layout.map_video);
iconStart = getResources().getDrawable(
R.drawable.arc_hf_btn_video_start);
iconStop = getResources().getDrawable(R.drawable.arc_hf_btn_video_stop);
parentId = getIntent().getIntExtra("parentId", 0);
timer = (TextView) findViewById(R.id.arc_hf_video_timer);
mVideoStartBtn = (Button) findViewById(R.id.arc_hf_video_start);
mSurfaceview = (SurfaceView) this.findViewById(R.id.arc_hf_video_view);
// 设置计时器不可见
timer.setVisibility(View.GONE);
// 设置缓存路径
mRecVedioPath = new File(Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/hfdatabase/video/temp/");
if (!mRecVedioPath.exists()) {
mRecVedioPath.mkdirs();
}
// 绑定预览视图
SurfaceHolder holder = mSurfaceview.getHolder();
holder.addCallback(new Callback() {
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
if (camera != null) {
if (isPreview) {
camera.stopPreview();
isPreview = false;
}
camera.release();
camera = null; // 记得释放
}
mSurfaceview = null;
mSurfaceHolder = null;
mMediaRecorder = null;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
camera = Camera.open();
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewFrameRate(5); // 每秒5帧
parameters.setPictureFormat(PixelFormat.JPEG);// 设置照片的输出格式
parameters.set("jpeg-quality", 85);// 照片质量
camera.setParameters(parameters);
camera.setPreviewDisplay(holder);
camera.startPreview();
isPreview = true;
} catch (Exception e) {
e.printStackTrace();
}
mSurfaceHolder = holder;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format,
int width, int height) {
mSurfaceHolder = holder;
}
});
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mVideoStartBtn.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
if (isRecording) {
/*
* 点击开始录像
*/
if (isPreview) {
camera.stopPreview();
camera.release();
camera = null;
}
second = 0;
minute = 0;
hour = 0;
bool = true;
if (mMediaRecorder == null)
mMediaRecorder = new MediaRecorder();
else
mMediaRecorder.reset();
mMediaRecorder.setPreviewDisplay(mSurfaceHolder
.getSurface());
mMediaRecorder
.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mMediaRecorder
.setAudioSource(MediaRecorder.AudioSource.MIC);
mMediaRecorder
.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mMediaRecorder
.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mMediaRecorder
.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mMediaRecorder.setVideoSize(320, 240);
mMediaRecorder.setVideoFrameRate(15);
try {
mRecAudioFile = File.createTempFile("Vedio", ".3gp",
mRecVedioPath);
} catch (IOException e) {
e.printStackTrace();
}
mMediaRecorder.setOutputFile(mRecAudioFile
.getAbsolutePath());
try {
mMediaRecorder.prepare();
timer.setVisibility(View.VISIBLE);
handler.postDelayed(task, 1000);
mMediaRecorder.start();
} catch (Exception e) {
e.printStackTrace();
}
showMsg("开始录制");
mVideoStartBtn.setBackgroundDrawable(iconStop);
isRecording = !isRecording;
} else {
/*
* 点击停止
*/
try {
bool = false;
mMediaRecorder.stop();
timer.setText(format(hour) + ":" + format(minute) + ":"
+ format(second));
mMediaRecorder.release();
mMediaRecorder = null;
videoRename();
} catch (Exception e) {
e.printStackTrace();
}
isRecording = !isRecording;
mVideoStartBtn.setBackgroundDrawable(iconStart);
showMsg("录制完成，已保存");
try {
camera = Camera.open();
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewFrameRate(5); // 每秒5帧
parameters.setPictureFormat(PixelFormat.JPEG);// 设置照片的输出格式
parameters.set("jpeg-quality", 85);// 照片质量
camera.setParameters(parameters);
camera.setPreviewDisplay(mSurfaceHolder);
camera.startPreview();
isPreview = true;
} catch (Exception e) {
e.printStackTrace();
}
}
}
});
Button btnImgStart = (Button) findViewById(R.id.arc_hf_img_start);
btnImgStart.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mMediaRecorder != null) {
try {
bool = false;
mMediaRecorder.stop();
timer.setText(format(hour) + ":" + format(minute) + ":"
+ format(second));
mMediaRecorder.release();
mMediaRecorder = null;
videoRename();
} catch (Exception e) {
e.printStackTrace();
}
isRecording = !isRecording;
mVideoStartBtn.setBackgroundDrawable(iconStart);
showMsg("录制完成，已保存");
try {
camera = Camera.open();
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewFrameRate(5); // 每秒5帧
parameters.setPictureFormat(PixelFormat.JPEG);// 设置照片的输出格式
parameters.set("jpeg-quality", 85);// 照片质量
camera.setParameters(parameters);
camera.setPreviewDisplay(mSurfaceHolder);
camera.startPreview();
isPreview = true;
} catch (Exception e) {
e.printStackTrace();
}
}
if (camera != null) {
camera.autoFocus(null);
camera.takePicture(null, null, new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data,
, data.length);
Matrix matrix = new Matrix();
// 设置缩放
matrix.postScale(5f, 4f);
bitmap = Bitmap.createBitmap(bitmap, 0, 0,
bitmap.getWidth(), bitmap.getHeight(),
matrix, true);
String path = Environment
.getExternalStorageDirectory()
.getAbsolutePath()
+ "/hfdatabase/img/"
+ String.valueOf(parentId) + "/";
String fileName = new SimpleDateFormat(
"yyyyMMddHHmmss").format(new Date())
+ ".jpg";
File out = new File(path);
if (!out.exists()) {
out.mkdirs();
}
out = new File(path, fileName);
try {
FileOutputStream outStream = new FileOutputStream(
out);
bitmap.compress(CompressFormat.JPEG, 100,
outStream);
outStream.close();
camera.startPreview();
} catch (Exception e) {
e.printStackTrace();
}
showMsg("拍照成功");
}
}); // 拍照
}
}
});
}
/*
* 消息提示
*/
private Toast toast;
public void showMsg(String arg) {
if (toast == null) {
toast = Toast.makeText(this, arg, Toast.LENGTH_SHORT);
} else {
toast.cancel();
toast.setText(arg);
}
toast.show();
}
/*
* 生成video文件名字
*/
protected void videoRename() {
String path = Environment.getExternalStorageDirectory()
.getAbsolutePath()
+ "/hfdatabase/video/"
+ String.valueOf(parentId) + "/";
String fileName = new SimpleDateFormat("yyyyMMddHHmmss")
.format(new Date()) + ".3gp";
File out = new File(path);
if (!out.exists()) {
out.mkdirs();
}
out = new File(path, fileName);
if (mRecAudioFile.exists())
mRecAudioFile.renameTo(out);
}
/*
* 定时器设置，实现计时
*/
private Handler handler = new Handler();
private Runnable task = new Runnable() {
public void run() {
if (bool) {
handler.postDelayed(this, 1000);
second++;
if (second >= 60) {
minute++;
second = second % 60;
}
if (minute >= 60) {
hour++;
minute = minute % 60;
}
timer.setText(format(hour) + ":" + format(minute) + ":"
+ format(second));
}
}
};
/*
* 格式化时间
*/
public String format(int i) {
String s = i + "";
if (s.length() == 1) {
s = "0" + s;
}
return s;
}
/*
* 覆写返回键监听
*/
@Override
public void onBackPressed() {
if (mMediaRecorder != null) {
mMediaRecorder.stop();
mMediaRecorder.release();
mMediaRecorder = null;
videoRename();
}
finish();
}
@Override
protected void onPause() {
super.onPause();
onBackPressed();
}
}

复制代码浏览图片/视频 FileShow.java

public class FileShow extends Activity {
private static final int MENU_DELETE = Menu.FIRST;
private static final int MENU_RENAME = Menu.FIRST + 1;
private File[] files;
private String[] names;
private String[] paths;
private GridView fileGrid;
private BaseAdapter adapter = null;
private String path;
private EditText etRename;
private File file;
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.map_file_show);
path = getIntent().getStringExtra("path");
File file = new File(path);
files = file.listFiles();
fileGrid = (GridView) findViewById(R.id.arc_hf_file_show);
adapter = new fileAdapter(this);
fileGrid.setAdapter(adapter);
showFileItems();
fileGrid.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
File f = new File(paths[arg2]);
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
String type = thisFileType(names[arg2]);
intent.setDataAndType(Uri.fromFile(f), type);
startActivity(intent);
}
});
// 注册上下文菜单
registerForContextMenu(fileGrid);
}
/*
* 覆写上下文菜单
*/
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
AdapterView.AdapterContextMenuInfo info = null;
try {
info = (AdapterView.AdapterContextMenuInfo) menuInfo;
} catch (ClassCastException e) {
return;
}
menu.setHeaderTitle(names[info.position]);
menu.add(0, MENU_DELETE, 1, "删除");
menu.add(0, MENU_RENAME, 2, "重命名");
}
/*
* 上下文菜单监听
*/
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item
.getMenuInfo();
File file = new File(paths[info.position]);
switch (item.getItemId()) {
case MENU_DELETE:
file.delete();
showFileItems();
return true;
case MENU_RENAME:
fileRename(file);
return true;
default:
return super.onContextItemSelected(item);
}
}
/*
* 获取文件
*/
private void showFileItems() {
File file = new File(path);
files = file.listFiles();
int count = files.length;
names = new String[count];
paths = new String[count];
for (int i = 0; i < count; i++) {
File f = files[i];
names[i] = f.getName();
paths[i] = f.getPath();
}
adapter.notifyDataSetChanged();
}
/*
* 获取文件类型
*/
public static String thisFileType(String name) {
String type = "";
String end = name.substring(name.lastIndexOf(".") + 1, name.length())
.toLowerCase();
if (end.equals("jpg")) {
type = "image";
} else if (end.equals("3gp")) {
type = "video";
} else {
type = "*";
}
type += "/*";
return type;
}
/**
* 重命名
*/
private void fileRename(File file) {
this.file = file;
View view = getLayoutInflater().inflate(R.layout.map_file_rename, null);
etRename = (EditText) view.findViewById(R.id.arc_hf_file_rename);
new AlertDialog.Builder(this).setView(view)
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String newName = etRename.getText().toString().trim();
File newFile = new File(path, newName);
if (newFile.exists()) {
showMsg(newName + "已经存在，请重新输入");
} else
FileShow.this.file.renameTo(newFile);
showFileItems();
}
}).setNegativeButton("取消", null).show();
}
/*
* 消息提示
*/
private Toast toast;
public void showMsg(String arg) {
if (toast == null) {
toast = Toast.makeText(this, arg, Toast.LENGTH_SHORT);
} else {
toast.cancel();
toast.setText(arg);
}
toast.show();
}
/*
* File adapter设置
*/
class fileAdapter extends BaseAdapter {
Context context;
public fileAdapter(Context context) {
this.context = context;
}
@Override
public int getCount() {
return files.length;
}
@Override
public Object getItem(int arg0) {
// return files[arg0];
return names[arg0];
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
String type = thisFileType(names[position]);
convertView = getLayoutInflater().inflate(R.layout.map_file_item,
null);
ImageView icon = (ImageView) convertView
.findViewById(R.id.arc_hf_file_icon);
TextView name = (TextView) convertView
.findViewById(R.id.arc_hf_file_name);
if (type.equals("video/*")) {
Bitmap videoIcon = ThumbnailUtils.createVideoThumbnail(
paths[position], Video.Thumbnails.MINI_KIND);
icon.setImageBitmap(videoIcon);
} else if (type.equals("image/*")) {
Bitmap bitmap = BitmapFactory.decodeFile(paths[position]);
Bitmap imgIcon = ThumbnailUtils.extractThumbnail(bitmap, 150,
);
icon.setImageBitmap(imgIcon);
}
name.setText(names[position]);
return convertView;
}
}
}

复制代码缩略图加载这一块速度特别慢，希望会异步加载缩略图的同学能功能交流一下

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