如何截取屏幕截图并将其保存在内部存储中？ 安卓

Question

我正在实施一个按钮，可以让您截取屏幕截图，但我想将其保存在 Android 内部存储而不是外部存储（SD 卡）中。

我试过这个：

private String saveToInternalStorage(Bitmap bitmapImage){
    ContextWrapper cw = new ContextWrapper(getApplicationContext());
     // path to /data/data/yourapp/app_data/imageDir
    File directory = cw.getDir("imageDir", Context.MODE_PRIVATE);
    // Create imageDir
    File mypath=new File(directory,"profile.jpg");

    FileOutputStream fos = null;
    try {           
        fos = new FileOutputStream(mypath);
   // Use the compress method on the BitMap object to write image to the OutputStream
        bitmapImage.compress(Bitmap.CompressFormat.PNG, 100, fos);
    } catch (Exception e) {
          e.printStackTrace();
    } finally {
          fos.close(); 
    } 
    return directory.getAbsolutePath();
}

我已经使用按钮的 OnClick 方法启动了此方法：

private void takeScreenshot(View v) {

    v = getWindow().getDecorView().getRootView();
    v.setDrawingCacheEnabled(true);
    Bitmap bitmap = Bitmap.createBitmap(v.getDrawingCache());
    v.setDrawingCacheEnabled(false);
   saveToInternalStorage(bitmap)

}

但这没有用。 相反，当我单击该按钮时，我的手机上会出现一条错误消息：“应用程序已停止”。

希望您能够帮助我。

Answer 1

/**
 * This function captures any Android views to a bitmap shapshot
 * and save it to a file path
 * and optionally open it with android pciture viewer
 */
public void CaptureView(View view, String filePath, boolean bOpen) {
        view.setDrawingCacheEnabled(true);
        Bitmap b = view.getDrawingCache();

        try {
            b.compress(CompressFormat.JPEG, 95, new FileOutputStream(filePath));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        if (bOpen) {
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_VIEW);
            intent.setDataAndType(Uri.parse("file://" + filePath), "image/*");
            startActivity(intent);
        }
}

用法：

File sdcard = Environment.getExternalStorageDirectory();
String path = sdcard + "/demo.jpg";
CaptureView(someViewInstace, path, false);

您可以使用Context.getFilesDir()方法来获取内部存储的路径：

String path = yourActivity.getFilesDir() + "/" + name);

Answer 2

我认为您需要使用 openFileOutput 来获取 FileOutputStream，请尝试按照文档https://developer.android.com/training/basics/data-storage/files.html 中的示例进行操作

logcat 中的错误是什么？

Answer 3

在清单文件中添加权限

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

添加这一行清单文件应用程序标记

android:requestLegacyExternalStorage="true"

活动中

public class MainActivity extends AppCompatActivity {

private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
        Manifest.permission.WRITE_EXTERNAL_STORAGE
};
Button button;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    button = findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            int permission = ActivityCompat.checkSelfPermission(MainActivity.this,
                    Manifest.permission.WRITE_EXTERNAL_STORAGE);

            if (permission != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(
                        MainActivity.this,
                        PERMISSIONS_STORAGE,
                        REQUEST_EXTERNAL_STORAGE);
            } else {

                takeScreenshot();
            }

        }
    });

}

private void takeScreenshot() {
    Date now = new Date();
    android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);

    try {
        // image naming and path  to include sd card  appending name you choose for file
        String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg";

        // create bitmap screen capture
        View v1 = getWindow().getDecorView().getRootView();
        v1.setDrawingCacheEnabled(true);
        Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
        v1.setDrawingCacheEnabled(false);

        File imageFile = new File(mPath);

        FileOutputStream outputStream = new FileOutputStream(imageFile);
        int quality = 100;
        bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream);
        outputStream.flush();
        outputStream.close();
        Toast.makeText(MainActivity.this, "Successfully saved", Toast.LENGTH_SHORT).show();
        //**if you want to open this screenshot
        openScreenshot(imageFile);
    } catch (Throwable e) {
        e.printStackTrace();
    }
}

private void openScreenshot(File imageFile) {
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    Uri uri = Uri.fromFile(imageFile);
    intent.setDataAndType(uri, "image/*");
    startActivity(intent);
}

}