如何将活动转换为导航抽屉的片段 [英] How do I convert activity to fragment for navigation drawer

问题描述

1周Android安卓新手。

我开发了一些基本的活动，我想实现导航抽屉只是我意识到我需要改成片段。根据我的基本活动，我知道应该怎么做。

公共类MainActivity扩展AppCompatActivity {
 DatabaseReference db; 
 FirebaseHelper助手; 
 CustomAdapter适配器; 
 ListView lv; 
 EditText nameEditTxt，destinationEditTxt，originEditTxt; 
 public EditText dateEditTxt; 
 DatePickerDialog datePickerDialog; 
 
 @Override 
 protected void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
工具栏工具栏=（工具栏）findViewById（R.id.toolbar）; 
 setSupportActionBar（toolbar）; 
 
 lv =（ListView）findViewById（R.id.lv）; 
 
 // INITIALIZE FIREBASE DB 
 db = FirebaseDatabase.getInstance（）。getReference（）; 
 helper = new FirebaseHelper（db）; 
 
 // ADAPTER 
 adapter = new CustomAdapter（this，helper.retrieve（））; 
 lv.setAdapter（adapter）; 
 FloatingActionButton fab =（FloatingActionButton）findViewById（R.id.fab）; 
 fab.setOnClickListener（new View.OnClickListener（）{
 @Override 
 public void onClick（View view）{
 displayInputDialog（）; 
} 
 }};} 
 
 public void showPickerDialog（）{
 DatePickerDialog dpd = null; 
 if（android.os.Build.VERSION.SDK_INT> = android.os.Build.VERSION_CODES.N）{
 dpd = new DatePickerDialog（MainActivity.this）; 
 dpd.setOnDateSetListener（new DatePickerDialog.OnDateSetListener（）{
 @Override 
 public void onDateSet（DatePicker datePicker，int i，int i1，int i2）{
 // here here如你所愿选择日期
字符串日期=年+ i +\ nmonth+ i1 +\ nay+ i2; 
 dateEditTxt.setText（日期）; 
} 
}）; 
} 
 
 if（dpd！= null）
 dpd.show（）; 
} 
 
 // DISPLAY输入对话框
 private void displayInputDialog（）{
 Dialog d = new Dialog（this）; 
 d.setTitle（添加新请求）; 
 d.setContentView（R.layout.input_dialog）; 
 nameEditTxt =（EditText）d.findViewById（R.id.nameEditText）; 
 destinationEditTxt =（EditText）d.findViewById（R.id.destinationEditText）; 
 originEditTxt =（EditText）d.findViewById（R.id.originEditText）; 
 dateEditTxt =（EditText）d.findViewById（R.id.dateEditText）; 
按钮saveBtn =（按钮）d.findViewById（R.id.saveBtn）; 
 
 
 dateEditTxt.setOnClickListener（new View.OnClickListener（）{
 @Override 
 public void onClick（View view）{
 showPickerDialog（）; 
} 
}）; 
 // SAVE 
 saveBtn.setOnClickListener（new View.OnClickListener（）{
 
 public void onClick（View v）{
 // GET DATA 
 String name = nameEditTxt.getText（）。toString（）; 
 String destination = destinationEditTxt.getText（）。toString（）; 
 String origin = originEditTxt.getText（）。toString（）; 
 String date = dateEditTxt.getText（）。toString（）; 
 // SET DATA 
 Request s = new Request（）; 
 s.setName（name）; 
 s .setOrigin（origin）; 
 s.setDestination（destination）; 
 s.setDate（date）; 
 
 // SIMPLE VALIDATION 
 
 if（ name！= null&& name.length（）> 0）{
 // THEN SAVE 
 if（helper.save（s））{
 // IF SAVED CLEAR EDITXT 
 dateEditTxt.setText（ ）; 
 originEditTxt.setText（）; 
 destinationEditTxt.setText（）; 
 dateEditTxt.setText（）; 
 
 adapter = new CustomAdapter（MainActivity.this，helper.retrieve（））; 
 lv.setAdapter（adapter）; 
} 
} else {
 Toast.makeText（MainActivity.this，No empty fills，Toast.LENGTH_SHORT）.show（）; 
} 
} 
}）; 
 d.show（）; 
}} 

我的尝试：



尝试搜索教程，但我无法理解，有些解决方案不起作用

解决方案

参见片段| Android开发者 [ ^ ]。首先创建一个简单的测试，以便您可以看到它是如何工作的。您可能需要重新设计现有应用程序才能使用此功能。



另请参阅创建导航抽屉| Android开发者 [ ^ ]。

1-week-Android newbie here.
I developed some basic activities and I wanted to implement Navigation Drawer only I realized I need to change to fragment. Any idea what should I do given my basic activity.

public class MainActivity extends AppCompatActivity {
    DatabaseReference db;
    FirebaseHelper helper;
    CustomAdapter adapter;
    ListView lv;
    EditText nameEditTxt, destinationEditTxt, originEditTxt;
    public EditText dateEditTxt;
    DatePickerDialog datePickerDialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        lv = (ListView) findViewById(R.id.lv);

        //INITIALIZE FIREBASE DB
        db = FirebaseDatabase.getInstance().getReference();
        helper = new FirebaseHelper(db);

        //ADAPTER
        adapter = new CustomAdapter(this, helper.retrieve());
        lv.setAdapter(adapter);
        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                displayInputDialog();
            }
        });}

    public void showPickerDialog() {
        DatePickerDialog dpd = null;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
            dpd = new DatePickerDialog(MainActivity.this);
            dpd.setOnDateSetListener(new DatePickerDialog.OnDateSetListener() {
                @Override
                public void onDateSet(DatePicker datePicker, int i, int i1, int i2) {
                    // here show picked date as you want
                    String date = "year " + i + "\nmonth " + i1 + "\nday " + i2;
                    dateEditTxt.setText(date);
                }
            });
        }

        if (dpd != null)
            dpd.show();
    }

    //DISPLAY INPUT DIALOG
    private void displayInputDialog() {
        Dialog d = new Dialog(this);
        d.setTitle("Add New Request");
        d.setContentView(R.layout.input_dialog);
        nameEditTxt = (EditText) d.findViewById(R.id.nameEditText);
        destinationEditTxt = (EditText) d.findViewById(R.id.destinationEditText);
        originEditTxt = (EditText) d.findViewById(R.id.originEditText);
        dateEditTxt = (EditText) d.findViewById(R.id.dateEditText);
        Button saveBtn = (Button) d.findViewById(R.id.saveBtn);


        dateEditTxt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showPickerDialog();
            }
        });
        //SAVE
        saveBtn.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                //GET DATA
                String name = nameEditTxt.getText().toString();
                String destination = destinationEditTxt.getText().toString();
                String origin = originEditTxt.getText().toString();
                String date = dateEditTxt.getText().toString();
                //SET DATA
                Request s = new Request();
                s.setName(name);
                s.setOrigin(origin);
                s.setDestination(destination);
                s.setDate(date);

                //SIMPLE VALIDATION

                if (name != null && name.length() > 0) {
                    //THEN SAVE
                    if (helper.save(s)) {
                        //IF SAVED CLEAR EDITXT
                        dateEditTxt.setText("");
                        originEditTxt.setText("");
                        destinationEditTxt.setText("");
                        dateEditTxt.setText("");

                        adapter = new CustomAdapter(MainActivity.this, helper.retrieve());
                        lv.setAdapter(adapter);
                    }
                } else {
                    Toast.makeText(MainActivity.this, "No empty fills", Toast.LENGTH_SHORT).show();
                }
            }
        });
        d.show();
    }}

What I have tried:

Tried to search tutorials but i couldn't really understand and some solution wouldn't work

解决方案

See Fragments | Android Developers[^]. Start by creating a simple test so you can see how it works. You may need to redesign your existing application in order to use this feature.

See also Creating a Navigation Drawer | Android Developers[^].

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