Question

这是我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.stopcall.app" >

    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >



        <activity
            android:name=".activities.ItemDetailActivity"
            android:label="@string/app_name" >

        </activity>
        <activity
                android:name=".activities.PopupActivity"
                android:label="@string/app_name"
                android:theme="@android:style/Theme.Translucent.NoTitleBar">

        </activity>
        <activity
            android:name=".activities.MainActivity"
            android:label="@string/title_activity_main"
            android:theme="@android:style/Theme.NoDisplay">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <receiver android:name="com.example.stopcall.app.OutgoingCallReceiver" >
            <!--<intent-filter>-->
                <!--<action android:name="android.intent.action.CALL_BUTTON" />-->
                <!--<category android:name="android.intent.category.DEFAULT" />-->
            <!--</intent-filter>-->
            <intent-filter>
                <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
            </intent-filter>
        </receiver>
    </application>

</manifest>

我开始申请。显示ItemDetailActivity。

然后我暂停它（让它隐藏在任务堆栈中）。

我使用的触发器会触发PopupActivity（半透明）和PopupFragment。

我想只看到片段，在创建时浮动在拨号器上。

这就是我添加android:theme="@android:style/Theme.Translucent.NoTitleBar">

的原因

然而，当显示片段时，ItemDetailActivity突然从堆栈中出现并显示为背景。

我该如何避免这种情况？意思是只有片段会在拨号器的顶部被看到触发它吗？

修改

正如我所提到的。该片段显示了它的活动，它只是透明的。问题是我的应用程序的另一个不相关的活动突然出现在任务堆栈中。

我的最终目标是在拨号器上显示一个弹出窗口。可以吗？

修改

我的接收器使用弹出片段启动新的透明活动。

    @Override
    protected void handleReceive(Context context, Intent intent) {
..

                Intent i = new Intent(context, PopupActivity.class);
                i.putExtra(Constants.DIALED_PHONE, phoneDal.getItem(phoneNumber));
                i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                context.startActivity(i);
                setResultData(null);

然而弹出窗口显示透明活动，并且显示先前显示的兄弟活动。

Answer 1

我认为你的问题是显示透明活动会使其他活动可见。这是因为这些活动在同一个任务堆栈中。

您应该尝试使用标记FLAG_ACTIVITY_CLEAR_TASK或FLAG_ACTIVITY_NEW_TASK

开始活动

/**
 * If set, this activity will become the start of a new task on this
 * history stack.  A task (from the activity that started it to the
 * next task activity) defines an atomic group of activities that the
 * user can move to.  Tasks can be moved to the foreground and background;
 * all of the activities inside of a particular task always remain in
 * the same order.  See
 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back
 * Stack</a> for more information about tasks.
 *
 * <p>This flag is generally used by activities that want
 * to present a "launcher" style behavior: they give the user a list of
 * separate things that can be done, which otherwise run completely
 * independently of the activity launching them.
 *
 * <p>When using this flag, if a task is already running for the activity
 * you are now starting, then a new activity will not be started; instead,
 * the current task will simply be brought to the front of the screen with
 * the state it was last in.  See {@link #FLAG_ACTIVITY_MULTIPLE_TASK} for a flag
 * to disable this behavior.
 *
 * <p>This flag can not be used when the caller is requesting a result from
 * the activity being launched.
 */
public static final int FLAG_ACTIVITY_NEW_TASK = 0x10000000;


/**
 * If set in an Intent passed to {@link Context#startActivity Context.startActivity()},
 * this flag will cause any existing task that would be associated with the
 * activity to be cleared before the activity is started.  That is, the activity
 * becomes the new root of an otherwise empty task, and any old activities
 * are finished.  This can only be used in conjunction with {@link #FLAG_ACTIVITY_NEW_TASK}.
 */
public static final int FLAG_ACTIVITY_CLEAR_TASK = 0X00008000;

如果您想在手机应用上显示您的用户界面。

执行此操作的最佳方法是使用浮动窗口。这也是一种非常流行的技术，用于在其他应用程序之上显示GUI等对话框。您可以通过Google获取更多信息，以下是一些基本操作。

mWindowManager = (WindowManager)getSystemService(WINDOW_SERVICE);
mWindowManager.addView(mView, mParams); //add the floating view
mWindowManager.updateViewLayout(mView, mParams); //update layout parameters (size/position)
mWindowManager.removeView(mView); //remote the floating view

为什么半透明活动显示另一种非半透明活动？

1 个答案: