这篇文章主要为大家详细介绍了Android相机、图册的基本常见使用方法，几乎涵盖了Android相机、图册操作方法，感兴趣的小伙伴们可以参考一下
本文为大家分享了Android相机、图册基本demo，供大家参考，具体内容如下
package com.example.democamera;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.View;
import android.widget.ImageView;
public class MainActivity extends Activity {
private ImageView iv;
static final int gallery = 1, camera = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
iv = (ImageView) findViewById(R.id.iv_picture);
}
/**
* 启动图片画廊
*
* @param view
*/
public void startGallery(View view) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, gallery);
}
/**
* 启动相机
*
* @param view
*/
public void startCamera(View view) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (isSDExsit()) {
/* 创建存放图片文件夹 */
File dir = new File(Environment.getExternalStorageDirectory()
+ "/my");
if (!dir.exists())
dir.mkdirs();
/* 设置图片参数 得到原尺寸的图片 */
File file = new File(dir, "aaa.jpg");
intent.putExtra(MediaStore.EXTRA_SCREEN_ORIENTATION,
Configuration.ORIENTATION_UNDEFINED);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
}
startActivityForResult(intent, camera);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case gallery:
/* 做判断，防止返回报错 */
if (data != null) {
/*
* 三种方式处理URI
*/
Uri uri = data.getData();
iv.setImageURI(uri);
Bitmap bitmap = BitmapFactory
.decodeFile(getPathByUri(uri, this));
iv.setImageBitmap(bitmap);
Bitmap bitmap2 = getBitmapByUri(uri, this);
iv.setImageBitmap(bitmap2);
}
break;
case camera:
if (data != null) {// 这是获得缩略图的方法
Bitmap b = (Bitmap) data.getExtras().get("data");
iv.setImageBitmap(b);
} else {// 有sd卡得到图片原图
Bitmap bitmap = BitmapFactory.decodeFile("sdcard/my/aaa.jpg");//直接这样做会有发生OOM的风险，Demo简单这么处理
iv.setImageBitmap(bitmap);
}
break;
default:
break;
}
}
/**
* Uri-->Bitmap
*
* @param uri
* @param context
* @return
*/
public static Bitmap getBitmapByUri(Uri uri, Context context) {
Bitmap bitmap = null;
try {
bitmap = MediaStore.Images.Media.getBitmap(
context.getContentResolver(), uri);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return bitmap;
}
/**
* Uri--->Path
*
* @param uri
* @param context
* @return
*/
public static String getPathByUri(Uri uri, Context context) {
String path = null;
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = context.getContentResolver().query(uri, projection,
null, null, null);
if (cursor.moveToFirst()) {
int index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
path = cursor.getString(index);
}
return path;
}
/**
* 判断SD卡是否存在
*
* @return
*/
public static boolean isSDExsit() {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
return true;
} else {
return false;
}
}
}
