需求分析:
1.A点击拉起B;
2.如果B没安装,下载安装;
3.如果B已安转,未在后台运行点击打开B,传值账号密码,做跨登录;
4.如果B已安装,且正在后台运行,A打开B直接显示在后台运行的页面;
1.A拉起B可实现的几种方法
(1)包名,特定Activity名拉起
Intent intent = new Intent(Intent.ACTION_MAIN);
/**知道要跳转应用的包命与目标Activity*/
ComponentName componentName = new ComponentName("cn.com.xxxx", "cn.com.xxxx.xxx.login.WelcomeActivity");
intent.setComponent(componentName);
intent.putExtra("", "");//这里Intent传值
startActivity(intent);
B应用需要在manifest文件对应Activity添加
android:exported="true"
(2)包名拉起(这里就是进去启动页)
Intent intent = getPackageManager().getLaunchIntentForPackage("cn.com.xxxx");
if (intent != null) {
intent.putExtra("type", "110");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
(3)url拉起
Intent intent = new Intent();
intent.setData(Uri.parse("csd://pull.csd.demo/cyn?type=110"));
intent.putExtra("", "");//这里Intent当然也可传递参数,但是一般情况下都会放到上面的URL中进行传递
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
B应用manifest文件需配置(注意:在原有intent-filter下方另外添加,不是在原先里面,两个同时存在)
<intent-filter>
<data
android:host="pull.csd.demo"
android:path="/cyn"
android:scheme="csd" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
</intent-filter>
优点:不暴露包名 缺点:host path schemeA应用和B应用得提前规定
2.判断B应用是否安装
/**
* 检查包是否存在
*
* @param packname
* @return
*/
private boolean checkPackInfo(String packname) {
PackageInfo packageInfo = null;
try {
packageInfo = getPackageManager().getPackageInfo(packname, 0);
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return packageInfo != null;
}
3.判断B应用是否在后台运行并直接打开
public static Intent getAppOpenIntentByPackageName(Context context,String packageName){
//Activity完整名
String mainAct = null;
//根据包名寻找
PackageManager pkgMag = context.getPackageManager();
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
intent.setFlags(Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED|Intent.FLAG_ACTIVITY_NEW_TASK);
List<ResolveInfo> list = pkgMag.queryIntentActivities(intent,
PackageManager.GET_ACTIVITIES);
for (int i = 0; i < list.size(); i++) {
ResolveInfo info = list.get(i);
if (info.activityInfo.packageName.equals(packageName)) {
mainAct = info.activityInfo.name;
break;
}
}
if (TextUtils.isEmpty(mainAct)) {
return null;
}
intent.setComponent(new ComponentName(packageName, mainAct));
return intent;
}
public static Context getPackageContext(Context context, String packageName) {
Context pkgContext = null;
if (context.getPackageName().equals(packageName)) {
pkgContext = context;
} else {
// 创建第三方应用的上下文环境
try {
pkgContext = context.createPackageContext(packageName,
Context.CONTEXT_IGNORE_SECURITY
| Context.CONTEXT_INCLUDE_CODE);
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
}
return pkgContext;
}
public static boolean openPackage(Context context, String packageName) {
Context pkgContext = getPackageContext(context, packageName);
Intent intent = getAppOpenIntentByPackageName(context, packageName);
if (pkgContext != null && intent != null) {
pkgContext.startActivity(intent);
return true;
}
return false;
}
if (checkPackInfo("cn.com.xxxxx")) {
openPackage(this,"cn.com.xxxxx");
} else {
Toast.makeText(this, "没有安装" + "",Toast.LENGTH_LONG).show();
//TODO 下载操作
}
这里运用的是模拟点击图标启动,不会出现程序多开,和栈顶Activity重复或者顺序错乱的问题。
当然Activity的LaunchMode最好设为“singletop”
来源:oschina
链接:https://my.oschina.net/u/4373992/blog/3230507