如何制作一个"别再问我"对话框弹出框？Android的

Question

我正在尝试创建一个"提示"对话框,通知用户在手机上启用GPS会降低电池寿命.我希望它弹出,但有一个复选框,上面写着:"别再问我了".

如何在Android中创建此功能？

谢谢,

Zukky.

AlertDialog.Builder prompt = new AlertDialog.Builder(this); 
prompt.setCancelable(false); 
prompt.setTitle("Warning"); 
prompt.setMessage ("HINT: Otherwise, it will use network to find" + 
                   "your location. It's inaccurate but saves on " + 
                   "battery! Switch GPS on for better accuracy " + 
                   "but remember it uses more battery!");

Answer 1

编辑:小心!代码重复提前.由于我不再为Android开发,我无法重构下面的代码.

它在Android首选项中设置一个值,并检查它是否显示对话框.

资源/布局中的checkbox.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_root"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal"
    android:padding="10dp" >
    <CheckBox
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/skip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Ok please do not show again." >
    </CheckBox>
</LinearLayout>

Activity.java

public class MyActivity extends Activity {
    public static final String PREFS_NAME = "MyPrefsFile1";
    public CheckBox dontShowAgain;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    @Override
    protected void onResume() {
        AlertDialog.Builder adb = new AlertDialog.Builder(this);
        LayoutInflater adbInflater = LayoutInflater.from(this);
        View eulaLayout = adbInflater.inflate(R.layout.checkbox, null);
        SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
        String skipMessage = settings.getString("skipMessage", "NOT checked");

        dontShowAgain = (CheckBox) eulaLayout.findViewById(R.id.skip);
        adb.setView(eulaLayout);
        adb.setTitle("Attention");
        adb.setMessage(Html.fromHtml("Zukky, how can I see this then?"));

        adb.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                String checkBoxResult = "NOT checked";

                if (dontShowAgain.isChecked()) {
                    checkBoxResult = "checked";
                }

                SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                SharedPreferences.Editor editor = settings.edit();

                editor.putString("skipMessage", checkBoxResult);
                editor.commit();

                // Do what you want to do on "OK" action

                return;
            }
        });

        adb.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                String checkBoxResult = "NOT checked";

                if (dontShowAgain.isChecked()) {
                    checkBoxResult = "checked";
                }

                SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                SharedPreferences.Editor editor = settings.edit();

                editor.putString("skipMessage", checkBoxResult);                    
                editor.commit();

                // Do what you want to do on "CANCEL" action

                return;
            }
        });

        if (!skipMessage.equals("checked")) {
            adb.show();
        }

        super.onResume();
    }
}

Answer 2

您必须创建一个自定义对话框,例如AlertDialog您在其上设置自定义内容视图(带有setView()).该自定义布局可以是TextView(显示信息)+ a CheckBox(with Do not ask me again).在OnClickListener对话框按钮的设置中,您将获得该状态,CheckBox如果用户选中它,则在首选项中设置一个标志(例如,布尔值为true).

下次用户使用该应用程序时,您将从首选项中检查该布尔值,如果设置为true,则您将不会显示该对话框,否则用户未检查CheckBox该对话框,因此您再次向他显示该对话框.

编辑示例应用程序

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;

public class DoNotShowDialog extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Button action = new Button(this);
        action.setText("Start the dialog if the user didn't checked the "
                + "checkbox or if is the first run of the app.");
        setContentView(action);
        action.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                SharedPreferences prefs = PreferenceManager
                        .getDefaultSharedPreferences(DoNotShowDialog.this);
                boolean dialog_status = prefs
                        .getBoolean("dialog_status", false);//get the status of the dialog from preferences, if false you ,ust show the dialog
                if (!dialog_status) {
                    View content = getLayoutInflater().inflate(
                            R.layout.dialog_content, null); // inflate the content of the dialog
                    final CheckBox userCheck = (CheckBox) content //the checkbox from that view
                            .findViewById(R.id.check_box1);
                    //build the dialog
                    new AlertDialog.Builder(DoNotShowDialog.this) 
                            .setTitle("Warning")
                            .setView(content)
                            .setPositiveButton("Ok",
                                    new DialogInterface.OnClickListener() {

                                        public void onClick(
                                                DialogInterface dialog,
                                                int which) {
                                            //find our if the user checked the checkbox and put true in the preferences so we don't show the dialog again 
                                            SharedPreferences prefs = PreferenceManager
                                                    .getDefaultSharedPreferences(DoNotShowDialog.this);
                                            SharedPreferences.Editor editor = prefs
                                                    .edit();
                                            editor.putBoolean("dialog_status",
                                                    userCheck.isChecked());
                                            editor.commit();
                                            dialog.dismiss(); //end the dialog.
                                        }
                                    })
                            .setNegativeButton("Cancel",
                                    new DialogInterface.OnClickListener() {

                                        public void onClick(
                                                DialogInterface dialog,
                                                int which) {
                                            //find our if the user checked the checkbox and put true in the preferences so we don't show the dialog again
                                            SharedPreferences prefs = PreferenceManager
                                                    .getDefaultSharedPreferences(DoNotShowDialog.this);
                                            SharedPreferences.Editor editor = prefs
                                                    .edit();
                                            editor.putBoolean("dialog_status",
                                                    userCheck.isChecked());
                                            editor.commit();
                                            dialog.dismiss();

                                        }
                                    }).show();
                } else {
                    //the preferences value is true so the user did checked the checkbox, so no dialog
                    Toast.makeText(
                            DoNotShowDialog.this,
                            "The user checked the checkbox so we don't show the dialog any more!",
                            Toast.LENGTH_LONG).show();
                }
            }
        });
    }
}

以及dialog(R.layout.dialog_content)内容的布局:

<?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="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Enabling GPS on your phone will decrease battery life!" />

    <CheckBox
        android:id="@+id/check_box1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Do not ask me again!" />

</LinearLayout>