加入直接启动摄像机拍照DEMO
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zengfantian
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:orientation="vertical" >
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<android.view.SurfaceView
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android:id="@+id/camera_preview"
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android:layout_width="match_parent"
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android:layout_height="0dip"
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android:layout_weight="1"
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android:layout_gravity="center" />
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<ImageView
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android:id="@+id/open_picIcon"
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android:layout_width="match_parent"
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android:layout_height="0dip"
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android:layout_weight="1"
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android:src="@drawable/avatar_default"
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android:visibility="gone"
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android:contentDescription="@string/app_name"
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/>
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<Button
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android:id="@+id/save_pic"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:text="拍照" />
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</LinearLayout>
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package com.zftlive.android.sample.camera;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.Date;
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import android.annotation.SuppressLint;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.PixelFormat;
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import android.hardware.Camera;
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import android.os.AsyncTask;
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import android.os.Environment;
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import android.text.format.DateFormat;
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import android.util.Log;
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import android.view.KeyEvent;
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import android.view.SurfaceHolder;
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import android.view.SurfaceView;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.widget.Button;
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import android.widget.ImageView;
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import com.zftlive.android.R;
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import com.zftlive.android.base.BaseActivity;
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import com.zftlive.android.tools.ToolAlert;
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import com.zftlive.android.tools.ToolPicture;
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/**
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* 直接启动摄像机硬件拍照，不启动系统拍照程序样例
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*
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* @author 曾繁添
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* @version 1.0
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*
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*/
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public class CameraPictureActivity extends BaseActivity {
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private SurfaceView surfaceView;
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private Button btnSave;
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private ImageView open_picIcon;
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private Camera camera;
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private SurfaceHolder surfaceHolder;
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private File picture;
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@Override
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public int bindLayout() {
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return R.layout.activity_camera_demo;
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}
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@Override
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public void initView(View view) {
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surfaceView = (SurfaceView) findViewById(R.id.camera_preview);
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surfaceHolder = surfaceView.getHolder();
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surfaceHolder.addCallback(surfaceCallback);
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surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
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open_picIcon = (ImageView) findViewById(R.id.open_picIcon);
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btnSave = (Button) findViewById(R.id.save_pic);
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btnSave.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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surfaceView.setVisibility(View.VISIBLE);
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open_picIcon.setVisibility(View.GONE);
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takePic();
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}
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});
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}
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@Override
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public void doBusiness(Context mContext) {
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}
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@Override
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public void resume() {
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}
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@Override
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public void destroy() {
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}
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@Override
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public boolean onKeyDown(int keyCode, KeyEvent event) {
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if (keyCode == KeyEvent.KEYCODE_CAMERA
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|| keyCode == KeyEvent.KEYCODE_SEARCH) {
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takePic();
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return true;
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}
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return super.onKeyDown(keyCode, event);
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}
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private void takePic() {
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// TODO stop the preview if remove comment block will system error
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// camera.stopPreview();
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camera.takePicture(null, null, pictureCallback);
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}
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/**
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* SurfaceHodler回调： 打开照相机、关闭照相机、设置照片尺寸等操作
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*/
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@SuppressLint("NewApi")
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SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {
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public void surfaceCreated(SurfaceHolder holder) {
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Log.i(TAG, "====surfaceCreated");
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try {
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camera = Camera.open();
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camera.setPreviewDisplay(holder);
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} catch (IOException e) {
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camera.release();
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camera = null;
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ToolAlert.dialog(getContext(), "错误提示", "启动相机失败",
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new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog,
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int which) {
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finish();
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}
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});
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}
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}
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@SuppressLint("NewApi")
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public void surfaceChanged(SurfaceHolder holder, int format, int width,
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int height) {
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Log.i(TAG, "====surfaceChanged");
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// 照相机参数
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Camera.Parameters parameters = camera.getParameters();
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parameters.setPictureFormat(PixelFormat.JPEG);
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parameters.set("rotation", 90);
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// TODO 三星PAD设置预览大小不正确会崩溃
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// parameters.setPreviewSize(480, 600);
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camera.setParameters(parameters);
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camera.setDisplayOrientation(90);
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camera.startPreview();
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}
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public void surfaceDestroyed(SurfaceHolder holder) {
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Log.i(TAG, "====surfaceDestroyed");
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camera.stopPreview();
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camera.release();
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camera = null;
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}
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};
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/**
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* 图片回调函数
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*/
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Camera.PictureCallback pictureCallback = new Camera.PictureCallback() {
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@Override
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public void onPictureTaken(byte[] data, Camera camera) {
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//等待提示
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getOperation().showLoading("正在处理，请稍后...");
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new SavePictureTask().execute(data);
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camera.startPreview();
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}
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};
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/**
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* 保存图片异步任务
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*/
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protected class SavePictureTask extends AsyncTask<byte[], String, String> {
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/**
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* 运行在UI线程中，在调用doInBackground()之前执行
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*/
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@Override
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protected void onPreExecute() {
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getOperation().updateLoadingText("正在保存...");
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}
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@Override
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protected String doInBackground(byte[]... params) {
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String fname = DateFormat.format("yyyyMMddhhmmss", new Date()).toString() + ".jpg";
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picture = new File(Environment.getExternalStorageDirectory()+ "/images/" + fname);
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//判断文件夹是否存在
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File file = picture.getParentFile();
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if (!file.exists())
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file.mkdir();
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Log.i(TAG,"fname=" + fname + ";dir="+ Environment.getExternalStorageDirectory());
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try {
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FileOutputStream fos = new FileOutputStream(picture.getPath());
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fos.write(params[0]);
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fos.close();
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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@Override
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protected void onPostExecute(String result) {
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super.onPostExecute(result);
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//矫正图片旋转角度
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Bitmap bitmap = getDiskBitmap(picture.getPath());
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//预览图片
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surfaceView.setVisibility(View.GONE);
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open_picIcon.setVisibility(View.VISIBLE);
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open_picIcon.setImageBitmap(bitmap);
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getOperation().updateLoadingText("保存完成!");
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getOperation().closeLoading();
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}
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}
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/**
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* 矫正旋转角度后的图像
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* @param filePath 图片文件
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* @return 矫正角度后的图像
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*/
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private Bitmap getDiskBitmap(String filePath) {
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Bitmap bitmap = null;
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try {
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File file = new File(filePath);
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if (file.exists())
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bitmap = BitmapFactory.decodeFile(filePath);
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// 获取图片的旋转角度，有些系统把拍照的图片旋转了，有的没有旋转
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int degree = ToolPicture.gainPictureDegree(filePath);
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if (degree != 0)
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bitmap = ToolPicture.rotaingBitmap(degree, bitmap);
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} catch (Exception e) {
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Log.e(TAG, e.getMessage());
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}
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return bitmap;
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}
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}
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