判断某个apk是否已经安装

/**

* 判断apk是否已经安装

* @param uri  apk包名

* @return

*/

private boolean isAppInstalled(String uri){

PackageManager pm = getPackageManager();

boolean installed =false;

try{

pm.getPackageInfo(uri,PackageManager.GET_ACTIVITIES);

installed =true;

}catch(PackageManager.NameNotFoundException e){

installed =false;

}

return installed;

}

调用

if(isAppInstalled("com.adobe.air")){

Toast.makeText(getApplicationContext(), "已经安装Adodeair插件",Toast.LENGTH_SHORT).show();

}else{

Toast.makeText(getApplicationContext(), "没有安装Adodeair插件",Toast.LENGTH_SHORT).show();

}