android - 在屏幕底部实现 Gmail Like "No connection"警报

Question

下面是 Gmail 无连接警报。我将如何在我的应用程序中实现这一目标？

注意:这是UI实现的问题，不判断是否有连接。

编辑::

底部通知是以对话框为主题并放置在底部的 Activity ，还是某种 AlertDialog？

Answer 1

也许这个例子可以帮助你https://github.com/DanielRasta/Material-Design-Alert-Box-

编辑 2:Material Design有Snackbar也上课

编辑 1:

嗯，思路是调用前面的dialog activity。所以要这样做:

1 - 创建 alertbox_activity.xml 布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal" 
    android:background="#8A8A8A">

    <TextView
        android:id="@+id/alertbox_message"
        android:layout_width="match_parent"
        android:paddingTop="10dp"
        android:layout_height="wrap_content"
        android:textColor="#ffffff"
        android:background="#8A8A8A"
        android:textSize="20sp"
        android:typeface="sans" 
        android:gravity="center" />

</LinearLayout>

2 - 创建一个名为 AlertBoxActivity.java 的 Activity 并粘贴此代码

public class AlertBoxActivity extends Activity {
    // ===========================================================
    // Constants
    // ===========================================================  
    private static final int EXIT_DELAY= 3500;
    public static final String KEY_BUNDLE_MESSAGE_TEXT = "AlertBoxActivity::message_text";  
    public static final String KEY_BUNDLE_PARENT_WIDTH = "AlertBoxActivity::parent_width";
    private static final String ERROR_GEN = "Oops.. Something went wrong.";

    private Runnable Exit(){
        return new  Runnable(){
            @Override
            public void run() {
                finish();
            }
        };
    }   

    // ===========================================================
    // Methods for/from super class
    // ===========================================================
    @Override
    public void onCreate(Bundle pBundle) {
        super.onCreate(pBundle);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.alertbox_activity);
        getWindow().setBackgroundDrawableResource(android.R.color.transparent);

        TextView textViewMessage = (TextView) findViewById(R.id.alertbox_message);    
        String strNotificationToShow = ERROR_GEN;
        int myParentWidth = getWindow().getAttributes().width;
        try {
            Bundle extras = getIntent().getExtras();
            if(extras != null) {    
                strNotificationToShow = extras.get(KEY_BUNDLE_MESSAGE_TEXT).toString();
                myParentWidth = extras.getInt(KEY_BUNDLE_PARENT_WIDTH);
            }
            else{
                myParentWidth = getWindow().getAttributes().width;
            }
        } 
        catch(Exception e) {
            e.printStackTrace();
            strNotificationToShow = ERROR_GEN;
            myParentWidth = getWindow().getAttributes().width;
        }       
        finally{
            textViewMessage.setText(strNotificationToShow);
        }

        WindowManager.LayoutParams params = getWindow().getAttributes();  
        params.width = myParentWidth;
        params.gravity = Gravity.BOTTOM;

        getWindow().setAttributes(params);

        Window window = getWindow();
        window.setAttributes((android.view.WindowManager.LayoutParams) params);
        window.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
        window.setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL, WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);

        new Handler().postDelayed(Exit(), EXIT_DELAY);
    }   
}

3 - 将这些行添加到您的 manifest.xml

<activity
    android:name="com.package.AlertBoxActivity"
    android:label="@string/app_name"
    android:theme="@style/Theme.AppCompat.Dialog">
    <intent-filter>
        <action android:name="android.intent.action.ALERT" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

4 - 调用它

Intent i = new Intent("android.intent.action.ALERT");       
i.putExtra(AlertBoxActivity.KEY_BUNDLE_MESSAGE_TEXT, "YOUR ALERT GOES HERE!");      
i.putExtra(AlertBoxActivity.KEY_BUNDLE_PARENT_WIDTH, getWindow().getAttributes().width);        
startActivity(i);

完成。