android中打开相机、打开相册进行图片的获取示例

 <!-- 使用网络权限 -->
<uses-permission android:name="android.permission.INTERNET"/>
<!-- 写sd卡的权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<!-- 读sd卡权限 -->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

public class TakePhotos extends Activity implements
android.view.View.OnClickListener {
Button takePhoto;
Bitmap photo;
String picPath;
Button capture;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_photo);
takePhoto = (Button) findViewById(R.id.button1);
capture = (Button) findViewById(R.id.capture);
takePhoto.setOnClickListener(this);
capture.setOnClickListener(this);
}


@Override
public void onClick(View viewid) {
switch (viewid.getId()) {
case R.id.button1: {// 打开相机
String state = Environment.getExternalStorageState();// 获取内存卡可用状态
if (state.equals(Environment.MEDIA_MOUNTED)) {
// 内存卡状态可用
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent, 1);
} else {
// 不可用
Toast.makeText(TakePhotos.this, "内存不可用", Toast.LENGTH_LONG)
.show();
}
break;
}
case R.id.capture: {// 打开相册
// 打开本地相册
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// 设定结果返回
startActivityForResult(i, 2);
break;
}
default:
break;
}
}


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (data != null) {
switch (requestCode) {
case 1:
// 两种方式 获取拍好的图片
if (data.getData() != null || data.getExtras() != null) { // 防止没有返回结果
Uri uri = data.getData();
if (uri != null) {
this.photo = BitmapFactory.decodeFile(uri.getPath()); // 拿到图片
}
if (photo == null) {
Bundle bundle = data.getExtras();
if (bundle != null) {
photo = (Bitmap) bundle.get("data");
FileOutputStream fileOutputStream = null;
try {
// 获取 SD 卡根目录 生成图片并
String saveDir = Environment
.getExternalStorageDirectory()
+ "/dhj_Photos";
// 新建目录
File dir = new File(saveDir);
if (!dir.exists())
dir.mkdir();
// 生成文件名
SimpleDateFormat t = new SimpleDateFormat(
"yyyyMMddssSSS");
String filename = "MT" + (t.format(new Date()))
+ ".jpg";
// 新建文件
File file = new File(saveDir, filename);
// 打开文件输出流
fileOutputStream = new FileOutputStream(file);
// 生成图片文件
this.photo.compress(Bitmap.CompressFormat.JPEG,
100, fileOutputStream);
// 相片的完整路径
this.picPath = file.getPath();
ImageView imageView = (ImageView) findViewById(R.id.imageView1);
imageView.setImageBitmap(this.photo);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fileOutputStream != null) {
try {
fileOutputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Toast.makeText(getApplicationContext(), "获取到了",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "找不到图片",
Toast.LENGTH_SHORT).show();
}
}
}
break;
case 2: {
//打开相册并选择照片，这个方式选择单张
// 获取返回的数据，这里是android自定义的Uri地址
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
// 获取选择照片的数据视图
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
// 从数据视图中获取已选择图片的路径
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
// 将图片显示到界面上
ImageView imageView = (ImageView) findViewById(R.id.imageView1);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
break;
}
default:
break;
}
}
}
}