第一行代码第二版8.3节 调用摄像头和相册

第一行代码第二版8.3节 调用摄像头和相册

废话不多说，直接贴代码
activity_main.xml代码：

<?xml version="1.0" encoding="utf-8"?>

MainActivity代码如下：
package activitytest.example.com.cameraalbumtest;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.provider.MediaStore;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {
public static final int TAKE_PHOTO=1;
private ImageView picture;
private Uri imageUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button takePhoto=(Button)findViewById(R.id.take_photo);
picture=(ImageView)findViewById(R.id.picture);
takePhoto.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
File outputImage=new File(getExternalCacheDir(),“output_image.jpg”);
try{
if (outputImage.exists()){
outputImage.delete();
}
outputImage.createNewFile();
}catch (IOException e){
e.printStackTrace();
}
if (Build.VERSION.SDK_INT>=24){
imageUri= FileProvider.getUriForFile(MainActivity.this,“com.example.cameraalbumtest.fileprovider”,outputImage);
}else{
imageUri=Uri.fromFile(outputImage);
}
Intent intent=new Intent(“android.media.action.IMAGE_CAPTURE”);
intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
startActivityForResult(intent,TAKE_PHOTO);
}
});
}
@Override
protected void onActivityResult(int requestCode,int resultCode,Intent data){
switch (requestCode){
case TAKE_PHOTO:
if (requestCode==RESULT_OK){
try {
Bitmap bitmap= BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
picture.setImageBitmap(bitmap);
}catch (FileNotFoundException e){
e.printStackTrace();
}
}
break;
default:
break;
}
}
}
file_paths.xml代码如下：



AndroidManifest代码如下：
<?xml version="1.0" encoding="utf-8"?>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme" >
    <activity android:name=".MainActivity" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

按照书上的文字说明，一步一步操作，就可以实现功能了。

标签：8.3,第一行,相册,代码,imageUri,Intent,import,android,outputImage
来源： https://blog.csdn.net/weixin_44003495/article/details/86571960