android自定义相机实例

【核心代码】

package com.test.mcameratest;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Calendar;
import java.util.Locale;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MyCameraActivity extends Activity {
/** Called when the activity is first created. */
private Button button;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button);

// 点击按钮跳转到系统拍照界面
button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

startActivityForResult(intent, 1);
}
});
}


// 复写onActivityForResult方法，用于获取拍摄的照片
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {

// 判断sdcard的状态，如果不可用，则弹出吐司，提示用户检查sdcard是否已安装
String sdStatus = Environment.getExternalStorageState();
if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检测sd是否可用
Log.i("TestFile",
"SD card is not avaiable/writeable right now.");
return;
}

// 获得利用Calender类，生成拍摄的照片的名字
String name = new DateFormat().format("yyyyMMdd_hhmmss",Calendar.getInstance(Locale.CHINA)) ".jpg";
Toast.makeText(this, name, Toast.LENGTH_LONG).show();

// 获得拍摄的照片
Bundle bundle = data.getExtras();
Bitmap bitmap = (Bitmap) bundle.get("data");// 获取相机返回的数据，并转换为Bitmap图片格式

FileOutputStream b = null;

// 获得sdcard的目录，并创建照片存储的文件夹
String sdcardPath = Environment.getExternalStorageDirectory().toString();
System.out.println(sdcardPath);
File file = new File(sdcardPath "/myImage/");
file.mkdirs();// 创建文件夹


// 定义照片的绝对路径
String fileName =sdcardPath "/myImage/" name;

try {
// 创建输出流，用于将照片写入到文件中去
b = new FileOutputStream(fileName);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);// 把数据写入文件
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
try {
b.flush();
b.close();
} catch (IOException e) {
e.printStackTrace();
}
}


((ImageView) findViewById(R.id.imageview)).setImageBitmap(bitmap);// 将图片显示在ImageView里
}
}
}