小编Bro*_*die的帖子

我正在尝试为我实现平滑动画ProgressBar,但是当我增加时间(30秒)时,动画不再平滑.

5秒示例:

30秒示例:

我的进展背景:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape>
            <padding android:top="1dp" />
            <solid android:color="#10444444" />
        </shape>
    </item>
    <item>
        <shape>
            <padding android:top="1dp" />
            <solid android:color="#20444444" />
        </shape>
    </item>
    <item>
        <shape>
            <padding android:top="1dp" />
            <solid android:color="#30444444" />
        </shape>
    </item>
    <item android:id="@android:id/background">
        <shape>
            <solid android:color="@color/black_thirty" />
        </shape>
    </item>

    <item android:id="@android:id/progress">
        <clip>
            <shape>
                <solid android:color="#3500D0" />
            </shape>
        </clip>
    </item>
</layer-list> 

我的进度布局:

<ProgressBar
    android:id="@+id/pb_loading"
    android:layout_width="match_parent"
    android:layout_height="8dp"
    android:indeterminate="false"
    android:layout_centerInParent="true"
    android:progress="100"
    android:progressDrawable="@drawable/my_progress_bar" />

我的动画方法:

private void startAnimation(){
    ProgressBar mProgressBar = (ProgressBar) findViewById(R.id.pb_loading);
    ObjectAnimator progressAnimator = ObjectAnimator.ofInt(mProgressBar, …

可以使用可选的&符号(父上下文)数据绑定创建隔离范围吗？

scope: {
  myMethod: '&?'
}

如果在没有分配myMethod的情况下实现该指令,则没有错误.但是,我看到,当未指定可选属性时,角度无论如何都会为其赋予noop功能.因此,似乎无法在指令中知道实现者是否为可选属性分配了方法.

link: function (scope, element, attrs) {
 scope.myMethod(); //this calls a noop function instead of being undefined, as i exected
}

任何见解？我想知道实现者是否已分配可选属性.

我想在Mac上运行"repo"命令(并从Git repo下载代码).我按照上面的指南:

http://threadeds.blogspot.com/2009/02/getting-started-with-google-android-on.html

当我执行命令时,

POSIXLY_CORRECT=1 sudo port install gmake libsdl git-core gnupg

我收到此错误:

我在安装时遇到以下问题

Error: git-core has been made obsolete by the port git. Please install git instead.
Error: org.macports.configure for port git-core returned: obsolete port
Please see the log file for port git-core for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_git-core/git-core/main.log
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: Processing of port git-core failed

我该如何解决这个问题？