以一个屏幕截图编程 [英] Take a screen shot programmatically

问题描述

在这里，您可以看到需要编程的屏幕截图和显示屏幕截图在图像查看和检查天气SD卡为您的设备或没有，为了节省屏幕快照到SD卡。

Here you can See take screen shot programmatically and display screen shot in Image View and and check weather SD card is in your device or not , To save screen shot in to the SD Card.

XML（main.xml中）

Xml(main.xml)

在main.xml中声明的所有视图对象。

In main.xml Declare all view objects.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/relativelayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <Button
        android:id="@+id/btn_screenshoot"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="20dp"
        android:text="Click Here to Create ScreenShot" />

    <ImageView
        android:id="@+id/imgv_showscreenshot"
        android:layout_width="216dp"
        android:layout_height="360dp"
        android:layout_below="@+id/btn_screenshoot"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp" />

</RelativeLayout>

Android的活动（ScreenshotActivity的.java）

Android Activity(ScreenshotActivity .java)

在本活动，我们可以看到，当用户点击按钮采取截图编程。

In this Activity we can see take a screenshot programatically when user click on Button.

package com.androidsurya.screenshot;

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()
                            + "/ScreenShots");
                    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();
                }

            }
        });

    }

}

AndroidManifest.xml中：

AndroidManifest.xml:

在manifest文件存储截屏SD卡是强制性的。

In manifest file to store screenshot in sdcard is mandatory.

<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>

经过大量的搜索终于此链接帮助。

推荐答案

将这个在OnCreate中

Display display = getWindowManager().getDefaultDisplay();
@SuppressWarnings("deprecation")
int width = display.getWidth();
int height = "ParentLayoutOFView".getMeasuredHeight();

createImage(height, width, linearLayout, "FileName");

将此方法

public File createImage(int height, int width, View view, String fileName) {
    Bitmap bitmapCategory = getBitmapFromView(view, height, width);
    return createFile(bitmapCategory, fileName);
}

public File createFile(Bitmap bitmap, String fileName) {

    File externalStorage = Environment.getExternalStorageDirectory();
    String sdcardPath = externalStorage.getAbsolutePath();
    File reportImageFile = new File(sdcardPath + "/YourFolderName" + fileName + ".jpg");
    try {
        if (reportImageFile.isFile()) {
            reportImageFile.delete();
        }
        if (reportImageFile.createNewFile()) {
            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
            FileOutputStream fo = new FileOutputStream(reportImageFile);
            fo.write(bytes.toByteArray());
            bytes.close();
            fo.close();

            return reportImageFile;
        }
    } catch (Exception e) {
        Toast.makeText(ReportsActivity.this, "Unable to create Image.Try again", Toast.LENGTH_SHORT).show();
    }
    return null;
}

public Bitmap getBitmapFromView(View view, int totalHeight, int totalWidth) {

    Bitmap returnedBitmap = Bitmap.createBitmap(totalWidth, totalHeight, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(returnedBitmap);
    Drawable bgDrawable = view.getBackground();
    if (bgDrawable != null)
        bgDrawable.draw(canvas);
    else
        canvas.drawColor(Color.WHITE);

    view.measure(MeasureSpec.makeMeasureSpec(totalWidth, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(totalHeight, MeasureSpec.EXACTLY));
    view.layout(0, 0, totalWidth, totalHeight);
    view.draw(canvas);
    return returnedBitmap;
}

这篇关于以一个屏幕截图编程的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！