# Camera01

**Repository Path**: AndroidUI/Camera01

## Basic Information

- **Project Name**: Camera01
- **Description**: 调用是手机摄像头拍照并转换成file
- **Primary Language**: Java
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2016-09-19
- **Last Updated**: 2022-06-12

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 调用手机摄像头拍照，并显示+转换成file，保存在本地 #
## 逻辑： ##
> activity_main.xml中有1个Button,1个imageView，点击button实现拍照，并显示在imageview中，而且保存在本地。
## 步骤 ##
1. 调用手机摄像头拍照
2. 将数据转换成Bitmap
3. 将bitmap转换成file
## 效果图： ##
![](http://i.imgur.com/DHUjAHy.png)
![](http://i.imgur.com/bYH7jfC.png)
##知识点：##
###怎么将Bitmap存放在file中?###
```
public static void saveBitmapToFile(String path, Bitmap bm) {
		File file = new File(path);
		if (!file.exists()) {
			try {
				file.createNewFile();

			} catch (Exception e) {
				e.printStackTrace();
			}
		}

		try {
			FileOutputStream fos = new FileOutputStream(file);
			bm.compress(CompressFormat.JPEG, 100, fos);//压缩格式，压缩比例
			fos.flush();
			fos.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
```
###怎么将byte[]数据转换成file?###
>通过FileoutputStream(File file)

```
File file = new File(path);
if (!file.exists()) {
	try {
		file.createNewFile();
	} catch (IOException e) {
		e.printStackTrace();
	}
}

FileOutputStream fos;
try {
	fos = new FileOutputStream(file);
	fos.write(data, 0, data.length);
	fos.flush();
	fos.close();
} catch (Exception e) {
	e.printStackTrace();
}
```
###怎么调用系统摄像头？###
>给intent添加action

```
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 1);
```
###怎么获取手机摄像头拍照的图片，并转换成bitmap？###
>在onActiivtyResult()方法中从intent中获取bundle，再从bundle获取bitmap

```
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		if (requestCode == 1) {
			Bundle bundle = data.getExtras();
			Bitmap bitmap = (Bitmap) bundle.get("data");//将数据转换成bitmap
		}
	}
```
>源码：https://git.oschina.net/beifang2008/Camera01

## MainActivity(代码注释) ##
 

```
package com.android.tackcamera01;

import java.io.IOException;

import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class MainActivity extends Activity {
	public String tag = "MainActivity";

	public SurfaceView surfaceView;
	public Camera camera;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		surfaceView = (SurfaceView) findViewById(R.id.surfaceview);
		SurfaceHolder holder = surfaceView.getHolder();
		holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		holder.addCallback(new MyCallBack());

	}

	class MyCallBack implements SurfaceHolder.Callback {

		@Override
		public void surfaceCreated(SurfaceHolder holder) {
			Log.d(tag, "###surfaceCreated");
			camera = Camera.open();
			try {
				camera.setPreviewDisplay(holder);
				camera.startPreview();

				camera.takePicture(null, null, new PictureCallback() {

					@Override
					public void onPictureTaken(byte[] data, Camera camera) {
//						String path2 = "data/data/"+getPackageName()+"/"+System.currentTimeMillis()+ ".jpg";
//						String path = Environment.getDataDirectory().getAbsolutePath()+ "/"+ System.currentTimeMillis()+ ".jpg";
//						Log.d(tag, "###"+Environment.getDataDirectory().getAbsolutePath());
//						FileUtil.saveFile(path, data);
						camera.startPreview();
					}
				});

			} catch (IOException e) {
				e.printStackTrace();
			}
		}

		@Override
		public void surfaceChanged(SurfaceHolder holder, int format, int width,
				int height) {
			Log.d(tag, "###surfaceChanged");

		}

		@Override
		public void surfaceDestroyed(SurfaceHolder holder) {
			Log.d(tag, "###surfaceDestroyed");
			if (camera != null) {
				camera.stopPreview();
				camera.release();
				camera = null;
			}
		}

	}
}

```

## Demo:http://download.csdn.net/detail/ss1168805219/9503230 ##