雖然Adobe已經宣稱不再支援android下的flash播放了，但是在HTML5沒有熱火起來之前還是有許多地方需要用到flash的，比如希望在android機子上使用以前flash製作的一些遊戲或者教學動畫。這裡寫了個demo使用android的WebView控制元件和Adobe的flash外掛來播放本地的卡丁車的swf檔案，在android機子上插上USB鍵盤就可以在android平臺機子上玩了。

首先上個播放的效果圖

程式碼架構

佈局檔案

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >
    <WebView
    	android:id="@+id/flashwebview"
    	android:layout_width="fill_parent"
    	android:layout_height="fill_parent"
    	/>
</LinearLayout>
 

package com.example.flashplayer;

import java.util.List;

import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.view.Menu;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings.PluginState;
import android.webkit.WebView;
import android.widget.ProgressBar;

public class MainActivity extends Activity {

	private WebView mWebView;
	private Handler mHandler=new Handler();
	private String mFlashFilename;
	private ProgressDialog mProgressDialog;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mWebView=(WebView)findViewById(R.id.flashwebview);
		setTitle("flash播放器");
		setTitleColor(Color.RED);
		mWebView.getSettings().setPluginsEnabled(true);
		mWebView.getSettings().setPluginState(PluginState.ON);
		Intent intent = getIntent();
		String str = intent.getStringExtra("flashName");
		if(str==null)
			mFlashFilename=new String("file:///android_asset/kaka.swf");
		else
			mFlashFilename=str;
		
		try {
			Thread.sleep(500);// 主執行緒暫停下，否則容易白屏，原因未知
		} catch (InterruptedException e) {
			// TODO 自動生成的 catch 塊
			e.printStackTrace();
		}
		
		mProgressDialog=ProgressDialog.show(this, "請稍等...", "載入flash中...", true);
		mWebView.setWebChromeClient(new WebChromeClient(){
			@Override
			public void onProgressChanged(WebView view, int newProgress) {
				// TODO Auto-generated method stub
				super.onProgressChanged(view, newProgress);
				System.out.println("newProgress:"+String.valueOf(newProgress));
				if(newProgress==100){
					new Handler().postDelayed(new Runnable() {
						
						@Override
						public void run() {
							// TODO Auto-generated method stub
							mProgressDialog.dismiss();
						}
					}, 500);
				}
			}
		});
		if(checkinstallornotadobeflashapk()){
			mWebView.loadUrl(mFlashFilename);
		}else{
			installadobeapk();
		}
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

	//退出時關閉flash播放
	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		mWebView.destroy();
		this.finish();
		System.gc();
	}
	//按下Back按鍵時關閉flash播放
	@Override
	public void onBackPressed() {
		// TODO Auto-generated method stub
		mWebView.destroy();
		this.finish();
		System.gc();
		super.onBackPressed();
	}
	//後臺執行
	@Override
	protected void onUserLeaveHint() {
		// TODO Auto-generated method stub
		mWebView.destroy();
		this.finish();
		System.gc();
		super.onUserLeaveHint();
	}
	//檢查機子是否安裝的有Adobe Flash相關APK 
	private boolean checkinstallornotadobeflashapk() {
		PackageManager pm = getPackageManager();
		List<PackageInfo> infoList = pm
				.getInstalledPackages(PackageManager.GET_SERVICES);
		for (PackageInfo info : infoList) {
			if ("com.adobe.flashplayer".equals(info.packageName)) {
				return true;
			}
		}
		return false;
	}
	
	//安裝Adobe Flash APK
	private void installadobeapk() {
		mWebView.addJavascriptInterface(new AndroidBridge(), "android");
		mWebView.loadUrl("file:///android_asset/go_market.html");
	}
	private class AndroidBridge {
		public void goMarket() {
			mHandler.post(new Runnable() {
				public void run() {
					Intent installIntent = new Intent(
							"android.intent.action.VIEW");
					installIntent.setData(Uri.parse("market://details?id=com.adobe.flashplayer"));
					startActivity(installIntent);
				}
			});
		}
	}
}