这里介绍在Android中实现相机调取、拍照片、获取照片、存储新路径等已经打开相册、选择照片等功能
首先看一下界面,很简单
配置读取内存卡和调用照相头的功能
下面是代码的主题
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; } } } }
注释的很详细,自己分析吧。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持考高分网。