读取本地APK文件的PackageInfo等信息简单使用方式

简单使用方式

 public void checkAPKIsExists(Context context, String downloadPath) {
        File file = new File(downloadPath);
        boolean result = false;
        if (file.exists()) {
                PackageManager pm = context.getPackageManager();
                PackageInfo info = pm.getPackageArchiveInfo(downloadPath, PackageManager.GET_ACTIVITIES);
               
                if (info != null）{
			info.versionCode;//获取版本号
			info.versionName;//获取版本名
			info.packageName;//获取包名
}
    }

第二个参数：

/**
     * {@link PackageInfo} flag: return information about
     * activities in the package in {@link PackageInfo#activities}.
     */
    public static final int GET_ACTIVITIES              = 0x00000001;

    /**
     * {@link PackageInfo} flag: return information about
     * intent receivers in the package in
     * {@link PackageInfo#receivers}.
     */
    public static final int GET_RECEIVERS               = 0x00000002;

    /**
     * {@link PackageInfo} flag: return information about
     * services in the package in {@link PackageInfo#services}.
     */
    public static final int GET_SERVICES                = 0x00000004;

    /**
     * {@link PackageInfo} flag: return information about
     * content providers in the package in
     * {@link PackageInfo#providers}.
     */
    public static final int GET_PROVIDERS               = 0x00000008;

    /**
     * {@link PackageInfo} flag: return information about
     * instrumentation in the package in
     * {@link PackageInfo#instrumentation}.
     */
    public static final int GET_INSTRUMENTATION         = 0x00000010;

    /**
     * {@link PackageInfo} flag: return information about the
     * intent filters supported by the activity.
     */
    public static final int GET_INTENT_FILTERS          = 0x00000020;

    /**
     * {@link PackageInfo} flag: return information about the
     * signatures included in the package.
     */
    public static final int GET_SIGNATURES          = 0x00000040;

    /**
     * {@link ResolveInfo} flag: return the IntentFilter that
     * was matched for a particular ResolveInfo in
     * {@link ResolveInfo#filter}.
     */
    public static final int GET_RESOLVED_FILTER         = 0x00000040;

    /**
     * {@link ComponentInfo} flag: return the {@link ComponentInfo#metaData}
     * data {@link android.os.Bundle}s that are associated with a component.
     * This applies for any API returning a ComponentInfo subclass.
     */
    public static final int GET_META_DATA               = 0x00000080;

通过这个参数可以获取包括四大组件在内的信息，之后就可以利用PackageInfo获取信息。

最后

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