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); } }