拍照与摄像头的Andr​​oid编程 [英] Taking pictures with camera android programmatically

问题描述

我创建了一个带有按钮的应用程序，并写了onClickListener该按钮。我尝试了好几种样品code例子，没有一次成功。它们都带来了Android摄像头应用程序，不拍照。我想一些code，我可以把我的onClickListener所以当我preSS屏幕上的按钮，一会被拍照。

I have created an app with a button and wrote onClickListener for that button. I have tried several sample code examples and none of them worked. They all bring up the android camera app and don't take photographs. I want some code which I can put in my onClickListener so when I press the button on the screen, a picture will be taken.

我怎样才能让相机拍摄照片时，我美元的一个机器人活动p $ PSS按钮？

How can I make the camera take a picture when I press a button in an android activity?

推荐答案

看看下面的演示code，

look at following demo code,

下面是UI的xml文件，

here is your xml file for UI,

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btnCapture"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Camera" />

</LinearLayout>

和这里是你的Java类文件，

and here is your java class file,

public class CameraDemoActivity extends Activity {
int TAKE_PHOTO_CODE = 0;
public static int count=0;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

//here,we are making a folder named picFolder to store pics taken by the camera using this application
        final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/"; 
        File newdir = new File(dir); 
        newdir.mkdirs();

    Button capture = (Button) findViewById(R.id.btnCapture);
    capture.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            // here,counter will be incremented each time,and the picture taken by camera will be stored as 1.jpg,2.jpg and likewise.
            count++;
            String file = dir+count+".jpg";
            File newfile = new File(file);
            try {
                newfile.createNewFile();
            } catch (IOException e) {}       

            Uri outputFileUri = Uri.fromFile(newfile);

            Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
            cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);

            startActivityForResult(cameraIntent, TAKE_PHOTO_CODE);
        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) {
        Log.d("CameraDemo", "Pic saved");


    }
}

}

注意： 请在您的清单文件中的以下权限，

Note: specify the following permissions in your manifest file,

<uses-permission android:name="android.permission.CAMERA"/>

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

我希望这会有所帮助！

I hope it will be helpful !!

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