Android实现调用系统摄像机拍照、录像,选取系统图片。
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2022-06-26 14:49:17
MainActivity:public class MainActivity extends AppCompatActivity { private ImageView iv; private VideoView videoView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); set...
MainActivity:
public class MainActivity extends AppCompatActivity {
private ImageView iv;
private VideoView videoView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
iv = (ImageView) findViewById(R.id.iv);
videoView = (VideoView) findViewById(R.id.video);
}
public void doClick(View view) {
switch (view.getId()) {
case R.id.btn_pick_image:
// TODO 选取系统相册图片
doPickImageFromSystem();
break;
case R.id.btn_open_camera_for_image:
// TODO 打开相机拍照
doOpenCameraForImage();
break;
case R.id.btn_open_camera_for_video:
// TODO 打开相机录像
doOpenCameraForVideo();
break;
}
}
private void doPickImageFromSystem() {
/**
* 参数一:打开系统相册的ACTION
* 参数二:返回数据的方式(从系统相册的数据库获取)
*/
CameraUtils.pickImageFromSystem(this);
}
private void doOpenCameraForImage() {
CameraUtils.openCameraForImage(this);
}
private void doOpenCameraForVideo() {
CameraUtils.openCameraForVideo(this);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//当结果码为RESULT_OK时,表示用户有效
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case CameraUtils.RequestCode.FLAG_REQUEST_SYSTEM_IMAGE:
String path = CameraUtils.getImagePathFromSystem(this, data);
if (path != null) {
iv.setImageBitmap(BitmapFactory.decodeFile(path));
}
break;
case CameraUtils.RequestCode.FLAG_REQUEST_CAMERA_IMAGE:
//TODO 处理从相机返回的图片数据
if (data != null) {
Bitmap bm = data.getParcelableExtra("data");
iv.setImageBitmap(bm);
} else {
Bitmap bm = BitmapFactory.decodeFile(CameraUtils.CAMERA_IMAGE);
iv.setImageBitmap(bm);
}
break;
case CameraUtils.RequestCode.FLAG_REQUEST_CAMERA_VIDEO:
//TODO 处理从相机返回的视频数据
videoView.setVideoURI(data.getData());
videoView.start();
break;
}
} else {
Log.i("info", "取消用户操作");
}
}
}
CameraUtils:
public class CameraUtils
{
public static final String CAMERA_IMAGE = "/sdcard/test.jpg";
public static final String CAMERA_VIDEO = "/sdcard/test.mp4";
public static void pickImageFromSystem(Activity activity)
{
/**
* 参数一:打开系统相册的ACTION 参数二:返回数据的方式(从系统相册的数据库获取)
*/
Intent intent = new Intent(Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
activity.startActivityForResult(intent,
RequestCode.FLAG_REQUEST_SYSTEM_IMAGE);
}
public static String getImagePathFromSystem(Activity activity, Intent data)
{
// TODO 处理从相册返回的图片数据
Uri uri = data.getData();// 使用getData方法获取要调用的接口
// 第二个参数表示要查询的数据的字段名
Cursor c = activity.getContentResolver().query(uri,
new String[]{MediaStore.Images.Media.DATA}, null, null, null);
if (c != null)
{
c.moveToFirst();
// 通过游标来获取名为MediaStore.Images.Media.DATA字段的值
String path = c.getString(c
.getColumnIndex(MediaStore.Images.Media.DATA));
return path;
}
return null;
}
public static void openCameraForImage(Activity activity)
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 仅当设置了MediaStore.EXTRA_OUTPUT参数时,系统将不再返回缩略图,而是会被完整保存以下路径
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(CAMERA_IMAGE)));
activity.startActivityForResult(intent,
CameraUtils.RequestCode.FLAG_REQUEST_CAMERA_IMAGE);
}
public static void openCameraForVideo(Activity activity)
{
Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
// 仅当设置了MediaStore.EXTRA_OUTPUT参数时,系统将不再返回缩略图,而是会被完整保存以下路径
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(CAMERA_VIDEO)));
activity.startActivityForResult(intent,
RequestCode.FLAG_REQUEST_CAMERA_VIDEO);
}
public interface RequestCode
{
int FLAG_REQUEST_SYSTEM_IMAGE = 0;
int FLAG_REQUEST_CAMERA_IMAGE = 1;
int FLAG_REQUEST_CAMERA_VIDEO = 2;
}
}
App:
public class App extends Application {
public static final String LOG_FILE = Environment.getExternalStorageDirectory() + "/logs/SystemTest/" + DateUtils.getDate1() + ".log";
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
@Override
public void onCreate() {
super.onCreate();
// android 7.0系统解决拍照的问题
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
builder.detectFileUriExposure();
LogHandler.initLogFile(new File(LOG_FILE));
}
}
LocalLog:
final class LocalLog {
private Date mLogTime;
private String mLogTag;
private String mLogMessage;
public LocalLog(String logTag, String logMessage) {
mLogTag = logTag;
mLogMessage = logMessage;
mLogTime = new Date();
}
@SuppressLint("SimpleDateFormat")
private SimpleDateFormat format1 = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
@Override
public String toString() {
String date = format1.format(mLogTime);
return "[" + date + "] [" + mLogTag + "] " + " " + mLogMessage;
}
}
LogHandler:
public class LogHandler {
private static final Lock sLock = new ReentrantLock();
private static ExecutorService mService = Executors.newFixedThreadPool(2);
private static ConcurrentLinkedQueue<String> mQueue = new ConcurrentLinkedQueue<>();
private static File mLogFile;
private LogHandler() {
}
public static void initLogFile(File file) {
//删除目录
if (file.exists() && file.isDirectory()) {
try {
FileUtils.deleteDirectory(file);
} catch (IOException e) {
//
}
}
//创建文件
if (!file.exists()) {
try {
file.getParentFile().mkdirs();
file.createNewFile();
Log.i("LOGHANDLER","创建日志文件成功");
LogHandler.writeFile("LOGHANDLER","创建日志文件成功");
} catch (IOException e) {
//
LogHandler.writeFile("LOGHANDLER","创建日志文件失败" + e.getMessage());
}
}
if (file.exists() && file.isFile()) mLogFile = file;
else throw new RuntimeException("is not file :" + file);
}
public static void writeFile(String tag, String string) {
// if (mLogFile == null)
// throw new RuntimeException("please init logFile , file is null");
mQueue.add(new LocalLog(tag, string).toString() + "\r\n");
mService.execute(mRunnable);
}
private static Runnable mRunnable = new Runnable() {
@Override
public void run() {
sLock.lock();
try {
StringBuilder msg = new StringBuilder();
while (!mQueue.isEmpty()) {
msg.append(mQueue.poll());
}
if (!TextUtils.isEmpty(msg.toString())) {
FileUtils.writeStringToFile(mLogFile, msg.toString(), true);
msg.delete(0, msg.length());
}
} catch (IOException e) {
e.printStackTrace();
LogHandler.writeFile("LOGHANDLER","创建日志文件失败" + e.getMessage());
} finally {
sLock.unlock();
}
}
};
}
xml文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/btn_pick_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="doClick"
android:text="选取系统相册图片" />
<Button
android:id="@+id/btn_open_camera_for_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="doClick"
android:text="打开相机拍照" />
<Button
android:id="@+id/btn_open_camera_for_video"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="doClick"
android:text="打开相机录像" />
<ImageView
android:id="@+id/iv"
android:layout_width="match_parent"
android:layout_height="120dp" />
<VideoView
android:id="@+id/video"
android:layout_width="match_parent"
android:layout_height="200dp" />
</LinearLayout>
我这里加了日志文件。
本文地址:https://blog.csdn.net/zhaochengfang/article/details/110533100
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