安卓app啓動另外一個app

通過反編譯工具，取得另外一個app的包名即可，封裝成工具類，如下：

private void doStartApplicationWithPackageName(String packagename) {

		// 通過包名獲取此APP詳細信息，包括Activities、services、versioncode、name等等
		PackageInfo packageinfo = null;
		try {
			packageinfo = getPackageManager().getPackageInfo(packagename, 0);
		} catch (NameNotFoundException e) {
			e.printStackTrace();
		}
		if (packageinfo == null) {
			return;
		}

		// 創建一個類別爲CATEGORY_LAUNCHER的該包名的Intent
		Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
		resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
		resolveIntent.setPackage(packageinfo.packageName);

		// 通過getPackageManager()的queryIntentActivities方法遍歷
		List<ResolveInfo> resolveinfoList = getPackageManager()
				.queryIntentActivities(resolveIntent, 0);

		ResolveInfo resolveinfo = resolveinfoList.iterator().next();
		if (resolveinfo != null) {
			// packagename = 參數packname
			String packageName = resolveinfo.activityInfo.packageName;
			// 這個就是我們要找的該APP的LAUNCHER的Activity[組織形式：packagename.mainActivityname]
			String className = resolveinfo.activityInfo.name;
			// LAUNCHER Intent
			Intent intent = new Intent(Intent.ACTION_MAIN);
			intent.addCategory(Intent.CATEGORY_LAUNCHER);

			// 設置ComponentName參數1:packagename參數2:MainActivity路徑
			ComponentName cn = new ComponentName(packageName, className);

			intent.setComponent(cn);
			startActivity(intent);
		}
	}