| 本文將介紹如何匯入 .aix 擴充元件到 App Inventor 測試伺服器，請注意您需登入 App Inventor 測試伺服器而非 AI2 的正式版伺服器。 延伸閱讀：App Inventor Extension 新測試伺服器，允許自定義元件了！ 請按照以下步驟操作： STEP1：請由此連結或本頁面末下載要匯入的 .aix 檔，這是 PuraVida 所寫的螢幕快照功能 STEP2：在畫面左側的 Extension 元件區中，點選 Import extension，會跳出以下視窗詢問 .aix 檔案路徑，確認之後請點選 Import 上傳檔案。  STEP3：命名元件，在此沒有改動  STEP4：匯入成功之後，就可以在 Extension 元件區看到這個元件了 STEP5：新增這個元件  STEP6：在 Blocks 頁面中也可以看到這個元件，相關的事件與方法當然都可以自由編寫 (Java)STEP7：寫個小程式來看看吧  補充資料：本 .aix 檔的 Java source code，有興趣的朋友可以看看 event 與 method 是如何對應的喔 Java source codepackage com.puravidaapps; import android.content.Context; import android.graphics.Bitmap; import android.util.Log; import android.view.View; import android.app.Activity; import android.os.Environment; import com.google.appinventor.components.annotations.DesignerComponent; import com.google.appinventor.components.annotations.DesignerProperty; import com.google.appinventor.components.annotations.PropertyCategory; import com.google.appinventor.components.annotations.SimpleEvent; import com.google.appinventor.components.annotations.SimpleFunction; import com.google.appinventor.components.annotations.SimpleObject; import com.google.appinventor.components.annotations.SimpleProperty; import com.google.appinventor.components.annotations.UsesPermissions; import com.google.appinventor.components.common.ComponentCategory; import com.google.appinventor.components.common.PropertyTypeConstants; import com.google.appinventor.components.runtime.*; import java.io.File; import java.io.FileOutputStream; @DesignerComponent(version = TaifunScreenshot.VERSION, description = “Extension to take a screenshot.”, category = ComponentCategory.EXTENSION, nonVisible = true, iconName = “https://puravidaapps.com/images/taifun16.png”) @SimpleObject(external = true) @UsesPermissions(permissionNames = “android.permission.WRITE_EXTERNAL_STORAGE”) public class TaifunScreenshot extends AndroidNonvisibleComponent implements Component { public static final int VERSION = 1; private ComponentContainer container; private Context context; private final Activity activity; private String fileName; private static final String LOG_TAG = “TaifunScreenshot”; public TaifunScreenshot(ComponentContainer container) { super(container.$form()); this.container = container; context = (Context) container.$context(); activity = (Activity) container.$context(); fileName = “screenshot.jpg”; Log.d(LOG_TAG, “TaifunScreenshot Created” ); } /** * Return fileName */ @SimpleProperty(category = PropertyCategory.BEHAVIOR, description = “filename of the screenshot to be taken”) public String FileName() { return fileName; } /** * Set fileName */ @DesignerProperty(editorType = PropertyTypeConstants.PROPERTY_TYPE_STRING, defaultValue = “screenshot.jpg”) @SimpleProperty public void FileName(String fileName) { this.fileName = fileName; } /** * Take a screenshot */ @SimpleFunction(description = “Take a screenshot.”) public void TakeScreenshot() { // “http://stackoverflow.com/a/5651242/1545993 try { // image naming and path to include sd card appending name you choose for file String mPath = Environment.getExternalStorageDirectory().toString() + File.separator + fileName; // create bitmap screen capture View v1 = activity.getWindow().getDecorView().getRootView(); v1.setDrawingCacheEnabled(true); Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache()); v1.setDrawingCacheEnabled(false); File imageFile = new java.io.File(mPath); FileOutputStream outputStream = new FileOutputStream(imageFile); int quality = 100; bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream); outputStream.flush(); outputStream.close(); Log.d(LOG_TAG, “screenshot taken: ” + imageFile.toString()); AfterScreenshot(imageFile.toString()); } catch (Throwable e) { // Several error may come out with file handling or OOM Log.e(LOG_TAG, e.getMessage(), e); e.printStackTrace(); } } /** * The AfterScreenshot event */ @SimpleEvent(description = “Return image.”) public void AfterScreenshot(String image){ EventDispatcher.dispatchEvent(this, “AfterScreenshot”, image); } } |
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com.puravidaapps.TaifunScreenshot.aix
(7k)
曾吉弘,
2015年10月3日 下午4:29
