Android - 截图不保存到图库

Question

我有一个应用程序，在单击按钮时会截取屏幕截图。

但是我想将截图保存到手机的主库中，这是行不通的。

如何将屏幕截图保存到手机主gallery.Essentially，将其保存到内存中。

MainActivity

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class ScreenshotActivity extends Activity {

    Button btn_screenshoot;
    int i = 0;
    ImageView imgv_showscreenshot;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        btn_screenshoot = (Button) findViewById(R.id.btn_screenshoot);
        btn_screenshoot.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                View view = findViewById(R.id.relativelayout);
                view.setDrawingCacheEnabled(true);
                Bitmap bitmap = view.getDrawingCache();
                BitmapDrawable bitmapDrawable = new BitmapDrawable(bitmap);
                imgv_showscreenshot = (ImageView) findViewById(R.id.imgv_showscreenshot);
                // set screenshot bitmapdrawable to imageview
                imgv_showscreenshot.setBackgroundDrawable(bitmapDrawable);

                if (Environment.MEDIA_MOUNTED.equals(Environment
                        .getExternalStorageState())) {
                    // we check if external storage is available, otherwise
                    // display an error message to the user using Toast Message
                    File sdCard = Environment.getExternalStorageDirectory();
                    File directory = new File(sdCard.getAbsolutePath()
                            + "/DCIM/Camera");
                    directory.mkdirs();

                    String filename = "screenshot" + i + ".jpg";
                    File yourFile = new File(directory, filename);

                    while (yourFile.exists()) {
                        i++;
                        filename = "screenshot" + i + ".jpg";
                        yourFile = new File(directory, filename);
                    }

                    if (!yourFile.exists()) {
                        if (directory.canWrite()) {
                            try {
                                FileOutputStream out = new FileOutputStream(
                                        yourFile, true);
                                bitmap.compress(Bitmap.CompressFormat.PNG, 90,
                                        out);
                                out.flush();
                                out.close();
                                Toast.makeText(
                                        ScreenshotActivity.this,
                                        "File exported to /sdcard/ScreenShots/screenshot"
                                                + i + ".jpg",
                                        Toast.LENGTH_SHORT).show();
                                i++;
                            } catch (IOException e) {
                                e.printStackTrace();
                            }

                        }
                    }

                } else {
                    Toast.makeText(ScreenshotActivity.this,
                            "Sorry SD Card not available in your Device!",
                            Toast.LENGTH_SHORT).show();
                }

            }
        });

    }

}

Android Manifest

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.androidsurya.screenshot"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

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

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.androidsurya.screenshot.ScreenshotActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>