【发布时间】：2012-04-02 21:48:51
【问题描述】：
我使用此代码从相机捕获图像。
package android.takeowneship;
import java.io.File;
import android.app.Activity;
import android.content.ContentValues;
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.provider.MediaStore;
import android.widget.ImageView;
import android.widget.Toast;
public class camera extends Activity{
private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
Uri imageUri;
private ImageView imageView;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//define the file-name to save photo taken by Camera activity
String fileName = "new-photo-name.jpg";
//create parameters for Intent with filename
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
values.put(MediaStore.Images.Media.DESCRIPTION,"Image capture by camera");
//imageUri is the current activity attribute, define and save it for later usage (also in onSaveInstanceState)
imageUri = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
//create new Intent
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
//use imageUri here to access the image
Toast.makeText(this, "picture has been taken"+ imageUri, Toast.LENGTH_SHORT).show();
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
}
}
}
public static File convertImageUriToFile (Uri imageUri, Activity activity) {
Cursor cursor = null;
try {
String [] proj={MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID, MediaStore.Images.ImageColumns.ORIENTATION};
cursor = activity.managedQuery( imageUri,
proj, // Which columns to return
null, // WHERE clause; which rows to return (all rows)
null, // WHERE clause selection arguments (none)
null); // Order-by clause (ascending by name)
int file_ColumnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
// int orientation_ColumnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.ORIENTATION);
if (cursor.moveToFirst()) {
// String orientation = cursor.getString(orientation_ColumnIndex);
return new File(cursor.getString(file_ColumnIndex));
}
return null;
} finally {
if (cursor != null) {
cursor.close();
}
}
}
}
但在此代码中，它会打开相机，用户必须单击按钮才能拍照。 我想要的是自动拍照（没有预览）并将其保存在存储卡中。
【问题讨论】：
-
您是否认为这实际上是一种安全措施？为什么你认为这是可能的？另外，你为什么需要那个？
-
积极的一点是，如果您确实找到了方法，我将不得不在某处提交错误报告 :-)
-
我正在构建一个安全应用程序。所以我需要在不认识用户的情况下拍照。
-
希望做不到！
标签： android camera android-camera-intent