我的博客地址
www.softwareboy.com.cn
虽然很丑,但是实用就可以了,言归正传!;
使用现有应用程序的Android摄像头应用程序
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent,0)
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SurfaceView
android:id="@+id/id_graph_sfv"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_gravity="bottom"
android:background="#393A3F"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="20dp">
<ImageButton
android:id="@+id/id_reset_camera"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:background="@drawable/reset"
android:visibility="visible" />
<ImageButton
android:id="@+id/reset"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:background="@drawable/pf"
android:visibility="gone" />
<ImageButton
android:id="@+id/id_ok"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="@drawable/ok" />
<FrameLayout
android:id="@+id/frameLayout"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_centerInParent="true"
android:background="@drawable/stop_bc"
android:padding="3dp"
android:visibility="visible">
<ImageButton
android:id="@+id/imageButton"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/camera" />
FrameLayout>
RelativeLayout>
FrameLayout>
import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.ImageFormat;
import android.graphics.Matrix;
import android.hardware.Camera;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.widget.ImageButton;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* 在这里需要注意的是,相机的释放一定要处理,在针对Android6.0 和7.0系统的*时候,我们的动态权限申请。这里我就不写出来了。GitHub上一堆可用方法;
**/
public class Photograph extends Activity implements SurfaceHolder.Callback {
private Camera mCamera;//声明相机(不要倒错包)
private SurfaceView mPrevice;//声明视图
private SurfaceHolder mHolder;//
private ImageButton id_graph_camera;//
private ImageButton id_ok;//
private ImageButton reset;//
private ImageButton id_reset_camera;//
private Bitmap bitmap = null;//
private String picUrl;//
private int cameraPosition = 1; // 0代表前置摄像头,1代表后置摄像头
private Bitmap bm = null;//
private Camera.Parameters parameters;//
//回调拍照声音的,想要静音拍照的同学,你们懂的!切记不要做坏事儿哦
private Camera.ShutterCallback shutterCallback = new Camera.ShutterCallback() {
@Override
public void onShutter() {
}
};
//相机拍照后对照片的回调
private Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
File tempFile = new File("/sdcard/" + System.currentTimeMillis() + ".png");
try {
FileOutputStream fos = new FileOutputStream(tempFile);
fos.write(data);
fos.close();
bm = BitmapFactory.decodeByteArray(data, 0, data.length);
Matrix matrix = new Matrix();
if (cameraPosition == 1) {
matrix.postRotate(90);
} else {
matrix.postRotate(270);
}
bitmap = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);
picUrl = saveImage(bitmap).getAbsolutePath();
id_reset_camera.setVisibility(View.VISIBLE);
reset.setVisibility(View.GONE);
id_ok.setVisibility(View.VISIBLE);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
};
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.photograph);
mPrevice = (SurfaceView) findViewById(R.id.id_graph_sfv);
id_graph_camera = (ImageButton) findViewById(R.id.imageButton);
id_ok = (ImageButton) findViewById(R.id.id_ok);
reset = (ImageButton) findViewById(R.id.reset);
id_reset_camera = (ImageButton) findViewById(R.id.id_reset_camera);
id_reset_camera.setVisibility(View.GONE);
reset.setVisibility(View.VISIBLE);
id_ok.setVisibility(View.GONE);
mHolder = mPrevice.getHolder();
mHolder.addCallback(this);
//判断内存卡是否存在的
checkSoftStage();
//重新启动相机,
id_reset_camera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mCamera.startPreview();
bm.recycle();
bitmap.recycle();
reset.setVisibility(View.VISIBLE);
id_ok.setVisibility(View.GONE);
id_reset_camera.setVisibility(View.GONE);
}
});
//切换摄像头
reset.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//切换前后摄像头
int cameraCount = 0;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();//得到摄像头的个数
for (int i = 0; i < cameraCount; i++) {
Camera.getCameraInfo(i, cameraInfo);//得到每一个摄像头的信息
if (cameraPosition == 1) {
//现在是后置,变更为前置
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
//代表摄像头的方位,CAMERA_FACING_FRONT前置 CAMERA_FACING_BACK后置
mCamera.stopPreview();//停掉原来摄像头的预览
mCamera.release();//释放资源
mCamera = null;//取消原来摄像头
mCamera = Camera.open(i);//打开当前选中的摄像头
try {
mCamera.setPreviewDisplay(mHolder);//通过surfaceview显示取景画面
} catch (IOException e) {
e.printStackTrace();
}
setStartPrevicw(mCamera, mHolder);
cameraPosition = 0;
break;
}
} else {
//现在是前置, 变更为后置
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
//代表摄像头的方位,CAMERA_FACING_FRONT前置 CAMERA_FACING_BACK后置
mCamera.stopPreview();//停掉原来摄像头的预览
mCamera.release();//释放资源
mCamera = null;//取消原来摄像头
mCamera = Camera.open(i);//打开当前选中的摄像头
try {
mCamera.setPreviewDisplay(mHolder);//通过surfaceview显示取景画面
} catch (IOException e) {
e.printStackTrace();
}
setStartPrevicw(mCamera, mHolder);
cameraPosition = 1;
break;
}
}
}
}
});
//确定了是你要的照片,你可以选择保存在相册,也可以选择跳转到你想要显示的页面中,我这边选择在下个页面显示
id_ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Photograph.this, MessageSendActivity.class);
intent.putExtra("TYPE", StaticInApp.CAMERA_IMAGE);
StaticInApp.image_cache.add(picUrl);
startActivity(intent);
Photograph.this.finish();
}
});
//点击开始拍照
id_graph_camera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startCamera();
}
});
}
/**
* 检测手机是否存在SD卡,网络连接是否打开
*/
private void checkSoftStage() {
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { //判断是否存在SD卡
String rootPath = Environment.getExternalStorageDirectory().getPath(); //获取SD卡的根目录
File file = new File(rootPath);
if (!file.exists()) {
file.mkdir();
}
} else {
new AlertDialog.Builder(this).setMessage("检测到手机没有存储卡!请插入手机存储卡再开启本应用。")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
}).show();
}
}
/**
* 保存本地照片
*
* @param bmp
* @return
*/
public static File saveImage(Bitmap bmp) {
File appDir = new File(Environment.getExternalStorageDirectory(), "images");
if (!appDir.exists()) {
appDir.mkdir();
}
String fileName = System.currentTimeMillis() + ".png";
File file = new File(appDir, fileName);
try {
FileOutputStream fos = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return file;
}
/**
* 点击事件
**/
public void startCamera() {
parameters = mCamera.getParameters();
parameters.setPictureFormat(ImageFormat.JPEG);
parameters.setPictureSize(800, 400);
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
mCamera.autoFocus(new Camera.AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
if (success) {
mCamera.takePicture(shutterCallback, null, mPictureCallback);
}
}
});
}
//相机的启动和Activity的生命周期进行绑定
@Override
protected void onResume() {
super.onResume();
if (mCamera == null) {
mCamera = getCamera();
if (mHolder != null) {
setStartPrevicw(mCamera, mHolder);
}
}
}
//相机的启动和Activity的生命周期进行绑定
@Override
protected void onPause() {
super.onPause();
releaseCamera();
}
/**
* 打开摄像头
*
* @return
*/
public Camera getCamera() {
Camera camera;
try {
camera = Camera.open();
} catch (Exception e) {
camera = null;
e.printStackTrace();
}
return camera;
}
/**
* 开始预览相机内容
*/
private void setStartPrevicw(Camera camera, SurfaceHolder holder) {
try {
camera.setPreviewDisplay(holder);
//系统预览角度的调整
camera.setDisplayOrientation(90);
//打开摄像头
camera.startPreview();
} catch (IOException e) {
e.printStackTrace();
//释放摄像头
releaseCamera();
}
}
/**
* 释放相机资源
*/
private void releaseCamera() {
if (mCamera != null) {
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
}
//在开始的时候创建画面显示的东西
@Override
public void surfaceCreated(SurfaceHolder holder) {
setStartPrevicw(mCamera, mHolder);
}
//当屏幕发生变化时候要做的事儿
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
mCamera.stopPreview();
setStartPrevicw(mCamera, mHolder);
}
//当界面销毁的时候要处理的事儿
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
releaseCamera();
}
}
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />