android 與其他程序交互（一）

1 目的                                                                                                                                                                                

 

許多應用程序需要與其他應用程序進行交互，如獲取其他應用程序的資源、獲取聯繫人中的電話號碼等。本文的目的即

是與其他應用程序發生交互時的關鍵應用。

 

2 處理步驟                                                                                                                                                                         

 

1）獲取資源目標

2）確定是否有解決或訪問目標支援的應用程序

3）如果有多個需要用戶選擇其中一個

4）處理

 

3 具體實現                                                                                                                                                                         

 

				// Build the intent
				Uri webpage = Uri.parse("http://www.android.com");
				Intent webIntent = new Intent(Intent.ACTION_VIEW, webpage);
				// Verify it resolves
				PackageManager packageManager = getPackageManager();
				List<ResolveInfo> activities = packageManager.queryIntentActivities(webIntent, 0);
				boolean isIntentSafe = activities.size() > 0;

				String title = "請選擇打開方式：";
				// Create and start the chooser
				Intent chooser = Intent.createChooser(webIntent, title);
				// Start an activity if it's safe
				if(isIntentSafe){
				startActivity(chooser);
				}else{
					Toast.makeText(mContext, "沒有可打開的應用程序", Toast.LENGTH_SHORT).show();
				}