android - 无法全屏截图

Question

我想让我的应用程序能够像我自己的设备一样通过触摸按钮截取正确的屏幕截图，但它似乎只是截取 View 的屏幕截图。我想要的是能够像我的设备一样对屏幕上的任何内容进行完整的截图。

这是我的java代码:

package com.arvisapps.lazyscreenshot;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.RelativeLayout;


public class MainActivity extends Activity {


RelativeLayout R1;
ImageView img;

NotificationCompat.Builder builder = new NotificationCompat.Builder(this);

private void showNotification() {
    builder.setAutoCancel(false);
    builder.setContentTitle("Take Screenshot");
    builder.setContentText("");
    builder.setSmallIcon(R.drawable.ic_notification);
    builder.setOngoing(true);

    Notification notification = builder.build();
    NotificationManager manager = (NotificationManager) this.getSystemService(NOTIFICATION_SERVICE);
    manager.notify(1, notification);
}

private void dontShowNotification(){
    NotificationManager nMgr = (NotificationManager) this.getSystemService(NOTIFICATION_SERVICE);
    nMgr.cancel(1);
}

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    R1 = (RelativeLayout) findViewById(R.id.relatv);
    CheckBox cb1 = (CheckBox) findViewById(R.id.cb_1);

    cb1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            if (isChecked == true) {
                showNotification();
            } else if (isChecked == false) {
                dontShowNotification();
            }
        }
    });
}

public void takeScreenshot(View v)
{
    View v1 = R1.getRootView();
    v1.setDrawingCacheEnabled(true);
    Bitmap bm = v1.getDrawingCache();
    BitmapDrawable bmDrawable = new BitmapDrawable(bm);
    img = (ImageView) findViewById(R.id.screenshots);
    img.setBackgroundDrawable(bmDrawable);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}


}

这是我的 XML:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/relatv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">

<RelativeLayout
    android:id="@+id/cb1_grp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true">

    <TextView
        android:id="@+id/cb1_txtvw"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="15dp"
        android:text="@string/cb1_txt" />

    <CheckBox
        android:id="@+id/cb_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@id/cb1_txtvw"
        android:layout_marginLeft="107dp"
        android:layout_marginStart="107dp"/>


</RelativeLayout>

<LinearLayout

    android:id="@+id/edittxt_grp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/cb1_grp"
    android:layout_centerHorizontal="true">

    <TextView
        android:id="@+id/edittxt_txtvw"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/delaytime" />

    <EditText
        android:id="@+id/edittxt_delay"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="number"/>

</LinearLayout>

<Button
    android:id="@+id/btn1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/edittxt_grp"
    android:layout_centerHorizontal="true"
    android:text="@string/btn1_txt"
    android:onClick="takeScreenshot"/>
<ImageView
    android:layout_below="@id/btn1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/screenshots"
    android:contentDescription="@string/app_name"
    />

Answer 1

如果您的手机已 root，请尝试。

进程 sh = Runtime.getRuntime().exec("su", null,null);

                OutputStream  os = sh.getOutputStream();
                os.write(("/system/bin/screencap -p " + "/sdcard/img.png").getBytes("ASCII"));
                os.flush();

                os.close();
                sh.waitFor();

然后读取img.png为位图，转换为jpg如下

Bitmap screen = BitmapFactory.decodeFile(Environment.getExternalStorageDirectory()+         
File.separator +"img.png");

//my code for saving
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    screen.compress(Bitmap.CompressFormat.JPEG, 15, bytes);

//you can create a new file name "test.jpg" in sdcard folder.

File f = new File(Environment.getExternalStorageDirectory()+ File.separator + "test.jpg");
            f.createNewFile();
//write the bytes in file
    FileOutputStream fo = new FileOutputStream(f);
    fo.write(bytes.toByteArray());
// remember close de FileOutput

    fo.close();