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我想使用 ContentProvider 从默认的 HTC 邮件应用程序读取来自 Android 设备 (Wildfire S) 的电子邮件，类似于读取 SMS：

Uri allMessage = Uri.parse("content://sms/");
ContentResolver cr = getContentResolver();
Cursor c = cr.query(allMessage, null, null, null, null);
while  (c.moveToNext()) {
    smss.add(new SMSObject(c)); //custom object which just retrieves all fields
}

邮件也应该有类似的东西，所以我检查了所有可用的 ContentProviders：

for (PackageInfo pack : getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS)) {
    ProviderInfo[] providers = pack.providers;
    if (providers != null) {
        for (ProviderInfo provider : providers) {
            Log.d("Example", "provider: " + provider.authority);
        }
    }
}

在此列表中（其中包含 , 和 之类的东西gmail-ls，sms所以com.android.calendar我在正确的轨道上）我找到了mail，所以我尝试了这个：

Uri allMessage = Uri.parse("content://mail/");
ContentResolver cr = getContentResolver();
Cursor c = cr.query(allMessage, null, null, null, null);
while  (c.moveToNext()) {
    emails.add(new SMSObject(c)); //custom object. should work with emails as well
}

但我得到了这个例外：

11-14 11:48:42.105: E/AndroidRuntime(3609): java.lang.RuntimeException: Unable to start activity ComponentInfo{nl.me.emailretriever/nl.me.emailretriever.MainActivity}: java.lang.SecurityException: Permission Denial: opening provider com.htc.android.mail.MailProvider from ProcessRecord{40685dd8 3609:nl.me.emailretriever/10076} (pid=3609, uid=10076) requires com.htc.android.mail.permission.READ_MAIL or com.htc.android.mail.permission.WRITE_MAIL... 11-14 11:48:42.105: E/AndroidRuntime(3609): Caused by: java.lang.SecurityException: Permission Denial: opening provider com.htc.android.mail.MailProvider from ProcessRecord{40685dd8 3609:nl.me.emailretriever/10076} (pid=3609, uid=10076) requires com.htc.android.mail.permission.READ_MAIL or com.htc.android.mail.permission.WRITE_MAIL

所以我添加了这两个权限，但无济于事。

<uses-permission android:name="com.htc.android.mail.permission.WRITE_MAIL" />
<uses-permission android:name="com.htc.android.mail.permission.READ_MAIL" />

我怎样才能像访问 SMS 一样阅读/访问电子邮件？为什么我得到一个例外，虽然我有所需的权限？

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