android canmera相机

阅读更多 MainActivity.java:
package com.canmera.test;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import android.app.Activity;import android.content.Intent;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;public class MainActivity extends Activity { private Button button_openCanmera, button_openAlbum, button_gaoQing; private ImageView imageView; private String imageUrl = "";// 要打开的图片的路径 @Override public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  findViews();  setListeners(); } private void findViews() {  // TODO Auto-generated method stub  button_openCanmera = (Button) findViewById(R.id.button1);  button_openAlbum = (Button) findViewById(R.id.button2);  button_gaoQing = (Button) findViewById(R.id.button3);  imageView = (ImageView) findViewById(R.id.imageView1); } private void setListeners() {  // TODO Auto-generated method stub  button_openCanmera.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    // 调用相机    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);    startActivityForResult(intent, 2);   }  });  // 这种方法保存的图片质量好点  button_gaoQing.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    // 调用相机    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);    // 拍完照片之后保存的路径（文件名）    String path = "/sdcard/myImage/gaoQing.png";    // 加上这个后，图片就不会被压缩变小了    intent.putExtra(MediaStore.EXTRA_OUTPUT,      Uri.fromFile(new File(path)));    startActivityForResult(intent, 1);   }  });    //打开相册  button_openAlbum.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    // Intent intent = new    // Intent(MainActivity.this,SDCARD123Activity.class);    // startActivity(intent);    Intent intent = new Intent(      Intent.ACTION_PICK,      android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);    intent.setType("image/*");    startActivityForResult(intent, 1);    // startActivityForResult(Intent.createChooser(intent,    // "Pick any photo"), 1);   }  });  imageView.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    if("".equals(imageUrl)){     Intent intent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);     intent.setType("image/*");     startActivityForResult(intent, 1);    }else{     Intent intent = new Intent(Intent.ACTION_VIEW);     intent.setDataAndType(Uri.fromFile(new File(imageUrl)),"image/*");     startActivity(intent);    }   }  }); } // 相机的回调函数 @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {  // TODO Auto-generated method stub  super.onActivityResult(requestCode, resultCode, data);  if (data != null && data.getExtras() != null) {// 普通的拍照   saveImage(requestCode, resultCode, data);   Bitmap bitmap = (Bitmap) data.getExtras().get("data");   imageView.setImageBitmap(bitmap);  } else if (data != null && data.getData() != null) {// 打开相册回调函数   String imagePath = getImagePath(data);   imageUrl = imagePath;   imageView.setImageBitmap(BitmapFactory.decodeFile(imagePath, null));  } else {// 获取高清图片的方法   imageUrl = "/sdcard/myImage/gaoQing.png";   imageView.setImageBitmap(BitmapFactory.decodeFile(imageUrl, null));  } } // 保存图片到sd卡(保存的图片不清晰) private void saveImage(int requestCode, int resultCode, Intent data) {  // TODO Auto-generated method stub  Bitmap bitmap = (Bitmap) data.getExtras().get("data");  String sdStatus = Environment.getExternalStorageState();  if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) {// 检查sd卡是否可用   Toast.makeText(this, "SD卡不可用", Toast.LENGTH_LONG).show();   return;  }  new File("/sdcard/myImage/").mkdirs();// 创建文件夹  OutputStream outputStream = null;  try {   String imagePath = "/sdcard/myImage/11.png";   outputStream = new FileOutputStream(imagePath);   bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);// 把数据写入文件quality的值0...100  } catch (FileNotFoundException e) {   // TODO Auto-generated catch block   e.printStackTrace();  } finally {   try {    if (outputStream != null) {     outputStream.flush();     outputStream.close();    }    if (bitmap != null) {     bitmap.recycle();//清理图片内存    }   } catch (IOException e) {    // TODO Auto-generated catch block    e.printStackTrace();   }  } } // 返回图片的绝对路径 private String getImagePath(Intent data) {  // TODO Auto-generated method stub  Uri uri = data.getData();// 可以得到图片在Content：//。。。中的地址，把它转化成绝对地址如下  String[] proj = { MediaStore.Images.Media.DATA };  String imagePath = "";  Cursor cursor = managedQuery(uri, proj,null, null, null);// 查哪一列  if (cursor != null) {   int column_index = cursor     .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);   if (cursor.getCount() > 0 && cursor.moveToFirst()) {    imagePath = cursor.getString(column_index);   }  }  return imagePath; } @Override public boolean onCreateOptionsMenu(Menu menu) {  getMenuInflater().inflate(R.menu.activity_main, menu);  return true; }}
manifest.xml:
com.canmera.test.rar (699.3 KB)
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