从摄像头和显示屏在活动捕获图像 [英] Capture Image from Camera and Display in Activity

问题描述

我想在这里上一个按钮，点击打开摄像头写一个模块，我可以点击和捕捉图像。如果我不喜欢我的形象可以删除它，然后点击一个更多的图像，然后选择图像，它应该返回，并在活动显示的图像。

I want to write a module where on a click of a button the camera opens and I can click and capture an image. If I don't like the image I can delete it and click one more image and then select the image and it should return back and display that image in the activity.

推荐答案

下面是将推出的摄像头应用程序，然后检索并显示图像的例子活动。

Here's an example activity that will launch the camera app and then retrieve the image and display it.

package edu.gvsu.cis.masl.camerademo;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class MyCameraActivity extends Activity {
    private static final int CAMERA_REQUEST = 1888; 
    private ImageView imageView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        this.imageView = (ImageView)this.findViewById(R.id.imageView1);
        Button photoButton = (Button) this.findViewById(R.id.button1);
        photoButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
                startActivityForResult(cameraIntent, CAMERA_REQUEST); 
            }
        });
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
        if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {  
            Bitmap photo = (Bitmap) data.getExtras().get("data"); 
            imageView.setImageBitmap(photo);
        }  
    } 
}

请注意，相机应用程序本身给你审查/夺回图像的能力，一旦图像被接受，该活动显示出来。

Note that the camera app itself gives you the ability to review/retake the image, and once an image is accepted, the activity displays it.

下面是，上述活动使用的布局。它只是包含ID为Button1的一个按钮，ID为imageview1一个ImageView的一个LinearLayout中：

Here is the layout that the above activity uses. It is simply a LinearLayout containing a Button with id button1 and an ImageView with id imageview1:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/photo"></Button>
    <ImageView android:id="@+id/imageView1" android:layout_height="wrap_content" android:src="@drawable/icon" android:layout_width="wrap_content"></ImageView>

</LinearLayout>

和最后一个细节，一定要加：

And one final detail, be sure to add:

<uses-feature android:name="android.hardware.camera"></uses-feature> 

如果摄像头是可选的，以您的应用程序的功能。确定将需要为假的许可。像这样

and if camera is optional to your app functionality. make sure to set require to false in the permission. like this

<uses-feature android:name="android.hardware.camera" android:required="false"></uses-feature>

您的manifest.xml。

to your manifest.xml.

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