App(a):判断是否为App(b)是否存在，不存在选择下载 存在后台状态直接唤醒 否则直接打开

App(a)部分代码

if (checkPackage("com.xxx.android")) {

if (ToolsUtils.isBackgroundRunning(this, "com.xxx.android")) {

Intent intent = new Intent();

intent.setPackage("com.xxx.android");

intent.setAction("com.xxx.android.open");

sendBroadcast(intent);

} else {

PackageManager packageManager = getPackageManager();

Intent intent = new Intent();

intent = packageManager

.getLaunchIntentForPackage("com.xxx.android");

startActivity(intent);

}

} else {

Toast.makeText(this, "点击下载app", Toast.LENGTH_SHORT).show();

}

App(b)部分代码 通过广播唤醒app

AndroidManifest.xml

原文：http://www.cnblogs.com/sumx/p/7060127.html