相对布局和导航抽屉？

Question

我是 android 的新手，我有一个相对布局，我正在为它实现导航抽屉，所以我不知道如何放置它。刷入和刷出不起作用...当我使用 DrawerLayout 和 FrameLayout 创建一个新项目时它正在运行但是当我在我的项目上实现时它出现故障

activity_main.xml
 <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
       android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/calc" >




    <ListView
        android:id="@+id/drawerlist"
        android:background="#00a77f"

        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="left" />





    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical" >

            <LinearLayout
                android:id="@+id/linearll1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="20dp"
                android:layout_marginRight="20dp"
                android:layout_marginTop="30dp"
                android:orientation="horizontal" >

                <Button
                    android:id="@+id/cs"
                    android:layout_width="100dp"
                    android:layout_height="140dp"
                    android:layout_weight="1"
                    android:alpha="0.5"
                    android:background="@drawable/roundbutton"
                    android:text="@string/cs"
                    android:textColor="@drawable/recbutcolor"
                    android:textSize="22sp"
                    android:textStyle="bold" />

                <Button
                    android:id="@+id/cal"
                    android:layout_width="100dp"
                    android:layout_height="140dp"
                    android:layout_marginLeft="20dp"
                    android:layout_weight="1"
                    android:alpha="0.5"
                    android:background="@drawable/roundbutton"
                    android:text="@string/maincalc"
                    android:textColor="@drawable/recbutcolor"
                    android:textSize="22sp"
                    android:textStyle="bold" />
            </LinearLayout>

            <LinearLayout
                android:id="@+id/linearll2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/linearll1"
                android:layout_marginLeft="20dp"
                android:layout_marginRight="20dp"
                android:layout_marginTop="30dp"
                android:orientation="horizontal" >

                <Button
                    android:id="@+id/interviewquestion"
                    android:layout_width="100dp"
                    android:layout_height="140dp"
                    android:layout_weight="1"
                    android:alpha="0.5"
                    android:background="@drawable/roundbutton"
                    android:text="@string/interview_ques"
                    android:textColor="@drawable/recbutcolor"
                    android:textSize="22sp"
                    android:textStyle="bold" />

                <Button
                    android:id="@+id/careerGuidance"
                    android:layout_width="100dp"
                    android:layout_height="140dp"
                    android:layout_marginLeft="20dp"
                    android:layout_weight="1"
                    android:alpha="0.5"
                    android:background="@drawable/roundbutton"
                    android:text="@string/career_guid"
                    android:textColor="@drawable/recbutcolor"
                    android:textSize="22sp"
                    android:textStyle="bold" />
            </LinearLayout>

            <Button
                android:id="@+id/about"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/linearll2"
                android:layout_gravity="center"
                android:layout_marginLeft="20dp"
                android:layout_marginRight="20dp"
                android:layout_marginTop="30dp"
                android:alpha="0.5"
                android:background="@drawable/roundbutton"
                android:gravity="center"
                android:text="@string/aboutme"
                android:textColor="@drawable/recbutcolor"
                android:textSize="22sp"
                android:textStyle="bold" />
        </LinearLayout>
    </ScrollView>

</RelativeLayout>
</android.support.v4.widget.DrawerLayout>

这是我的 MainActivity： MainActivity.java

import android.content.Intent;
import android.content.res.Configuration;

import android.os.Bundle;

import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;

import android.view.Menu;

import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity implements
        OnItemClickListener {
    private DrawerLayout drawerLayout;
    private ListView listView;
    private String[] navdra;
    private ActionBarDrawerToggle drawerListner;

    Intent shareintent;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        navdra = getResources().getStringArray(R.array.navdra);

        listView = (ListView) findViewById(R.id.drawerlist);
        listView.setAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_expandable_list_item_1, navdra));
        listView.setOnItemClickListener(this);
        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawerListner = new ActionBarDrawerToggle(this, drawerLayout,
                R.drawable.ic_drawer, R.string.dopen, R.string.dclose);



        drawerLayout.setDrawerListener(drawerListner);
        getSupportActionBar().setHomeButtonEnabled(true);
        getActionBar().setDisplayHomeAsUpEnabled(true);


        Button csv = (Button) findViewById(R.id.cs);
        csv.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Intent intent = new Intent(v.getContext(), Semester.class);
                startActivityForResult(intent, 0);
            }
        });

        Button cal = (Button) findViewById(R.id.cal);
        cal.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Intent intent = new Intent(v.getContext(), Calculator.class);
                startActivityForResult(intent, 0);
            }
        });

        Button iq = (Button) findViewById(R.id.interviewquestion);

        iq.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Intent intent = new Intent(v.getContext(),
                        InterviewQuestion.class);
                startActivityForResult(intent, 0);
            }
        });

        Button cg = (Button) findViewById(R.id.careerGuidance);
        cg.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Intent intent = new Intent(v.getContext(), Careerguid.class);
                startActivityForResult(intent, 0);
            }
        });

        Button abt = (Button) findViewById(R.id.about);
        abt.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(), "PKlabs!!!",
                        Toast.LENGTH_SHORT).show();
                // Intent intent = new Intent
                // (v.getContext(),InterviewQuestion.class);
                // startActivityForResult(intent,0);
            }
        });

    }


    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        // TODO Auto-generated method stub
        super.onConfigurationChanged(newConfig);
        drawerListner.onConfigurationChanged(newConfig);
    }


    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onPostCreate(savedInstanceState);
        drawerListner.syncState();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        MenuItem item = menu.add("share"); // your desired title here
        item.setIcon(R.drawable.share_icon); // your desired icon here
        item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);

        item.setOnMenuItemClickListener(new OnMenuItemClickListener() {

            @Override
            public boolean onMenuItemClick(MenuItem item) {
                shareintent = new Intent(android.content.Intent.ACTION_SEND);
                shareintent.setType("text/plain");
                String shareBody = "Here is the share content body";
                shareintent.putExtra(android.content.Intent.EXTRA_SUBJECT,
                        "Subject Here");
                shareintent.putExtra(Intent.EXTRA_TEXT, "Hi there");
                startActivity(Intent.createChooser(shareintent, "Share via"));
                return true;
            }
        });

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }

        if(drawerListner.onOptionsItemSelected(item))
        {
            return true;
        }




        return super.onOptionsItemSelected(item);
    }


    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        // TODO Auto-generated method stub
        Toast.makeText(this, navdra[position] + " selected",
                Toast.LENGTH_SHORT).show();
        selectItem(position);
    }

    public void selectItem(int position) {
        // TODO Auto-generated method stub
        listView.setItemChecked(position, true);
        setTitle(navdra[position]);
    }

    public void setTitle(String title) {
        getSupportActionBar().setTitle(title);
    }




    private Toast toast;
    private long lastBackPressTime = 0;

    @Override
    public void onBackPressed() {
        if (this.lastBackPressTime < System.currentTimeMillis() - 4000) {
            toast = Toast.makeText(this, "Press back again to exit",
                    Toast.LENGTH_LONG);
            toast.show();
            this.lastBackPressTime = System.currentTimeMillis();
        } else {
            if (toast != null) {
                toast.cancel();
            }
            super.onBackPressed();
        }
    }


}

Answer 1

DrawerLayout 中的第一个元素是 activity 内容（在您的例子中是 RelativeLayout）。第二个是抽屉本身（ListView 给你）。

将您的布局更改为：

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
                                        android:id="@+id/drawer_layout"
                                        android:layout_width="match_parent"
                                        android:layout_height="match_parent" >

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                    xmlns:tools="http://schemas.android.com/tools"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="@drawable/calc" >
        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent" >

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical" >

                <LinearLayout
                    android:id="@+id/linearll1"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="20dp"
                    android:layout_marginRight="20dp"
                    android:layout_marginTop="30dp"
                    android:orientation="horizontal" >

                    <Button
                        android:id="@+id/cs"
                        android:layout_width="100dp"
                        android:layout_height="140dp"
                        android:layout_weight="1"
                        android:alpha="0.5"
                        android:background="@drawable/roundbutton"
                        android:text="@string/cs"
                        android:textColor="@drawable/recbutcolor"
                        android:textSize="22sp"
                        android:textStyle="bold" />

                    <Button
                        android:id="@+id/cal"
                        android:layout_width="100dp"
                        android:layout_height="140dp"
                        android:layout_marginLeft="20dp"
                        android:layout_weight="1"
                        android:alpha="0.5"
                        android:background="@drawable/roundbutton"
                        android:text="@string/maincalc"
                        android:textColor="@drawable/recbutcolor"
                        android:textSize="22sp"
                        android:textStyle="bold" />
                </LinearLayout>

                <LinearLayout
                    android:id="@+id/linearll2"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/linearll1"
                    android:layout_marginLeft="20dp"
                    android:layout_marginRight="20dp"
                    android:layout_marginTop="30dp"
                    android:orientation="horizontal" >

                    <Button
                        android:id="@+id/interviewquestion"
                        android:layout_width="100dp"
                        android:layout_height="140dp"
                        android:layout_weight="1"
                        android:alpha="0.5"
                        android:background="@drawable/roundbutton"
                        android:text="@string/interview_ques"
                        android:textColor="@drawable/recbutcolor"
                        android:textSize="22sp"
                        android:textStyle="bold" />

                    <Button
                        android:id="@+id/careerGuidance"
                        android:layout_width="100dp"
                        android:layout_height="140dp"
                        android:layout_marginLeft="20dp"
                        android:layout_weight="1"
                        android:alpha="0.5"
                        android:background="@drawable/roundbutton"
                        android:text="@string/career_guid"
                        android:textColor="@drawable/recbutcolor"
                        android:textSize="22sp"
                        android:textStyle="bold" />
                </LinearLayout>

                <Button
                    android:id="@+id/about"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/linearll2"
                    android:layout_gravity="center"
                    android:layout_marginLeft="20dp"
                    android:layout_marginRight="20dp"
                    android:layout_marginTop="30dp"
                    android:alpha="0.5"
                    android:background="@drawable/roundbutton"
                    android:gravity="center"
                    android:text="@string/aboutme"
                    android:textColor="@drawable/recbutcolor"
                    android:textSize="22sp"
                    android:textStyle="bold" />
            </LinearLayout>
        </ScrollView>
    </RelativeLayout>

    <ListView
        android:id="@+id/drawerlist"
        android:background="#00a77f"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="left" />
</android.support.v4.widget.DrawerLayout>

Answer 2

那是因为 layout_gravity 不适用于 RelativeLayout。请改用框架布局。

编辑

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
                                        android:id="@+id/drawer_layout"
                                        android:layout_width="match_parent"
                                        android:layout_height="match_parent">

    <ListView
        android:id="@+id/drawerlist"
        android:background="#00a77f"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"/>

    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:background="@drawable/calc">


        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical">

                <LinearLayout
                    android:id="@+id/linearll1"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="20dp"
                    android:layout_marginRight="20dp"
                    android:layout_marginTop="30dp"
                    android:orientation="horizontal">

                    <Button
                        android:id="@+id/cs"
                        android:layout_width="100dp"
                        android:layout_height="140dp"
                        android:layout_weight="1"
                        android:alpha="0.5"
                        android:background="@drawable/roundbutton"
                        android:text="@string/cs"
                        android:textColor="@drawable/recbutcolor"
                        android:textSize="22sp"
                        android:textStyle="bold"/>

                    <Button
                        android:id="@+id/cal"
                        android:layout_width="100dp"
                        android:layout_height="140dp"
                        android:layout_marginLeft="20dp"
                        android:layout_weight="1"
                        android:alpha="0.5"
                        android:background="@drawable/roundbutton"
                        android:text="@string/maincalc"
                        android:textColor="@drawable/recbutcolor"
                        android:textSize="22sp"
                        android:textStyle="bold"/>
                </LinearLayout>

                <LinearLayout
                    android:id="@+id/linearll2"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/linearll1"
                    android:layout_marginLeft="20dp"
                    android:layout_marginRight="20dp"
                    android:layout_marginTop="30dp"
                    android:orientation="horizontal">

                    <Button
                        android:id="@+id/interviewquestion"
                        android:layout_width="100dp"
                        android:layout_height="140dp"
                        android:layout_weight="1"
                        android:alpha="0.5"
                        android:background="@drawable/roundbutton"
                        android:text="@string/interview_ques"
                        android:textColor="@drawable/recbutcolor"
                        android:textSize="22sp"
                        android:textStyle="bold"/>

                    <Button
                        android:id="@+id/careerGuidance"
                        android:layout_width="100dp"
                        android:layout_height="140dp"
                        android:layout_marginLeft="20dp"
                        android:layout_weight="1"
                        android:alpha="0.5"
                        android:background="@drawable/roundbutton"
                        android:text="@string/career_guid"
                        android:textColor="@drawable/recbutcolor"
                        android:textSize="22sp"
                        android:textStyle="bold"/>
                </LinearLayout>

                <Button
                    android:id="@+id/about"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/linearll2"
                    android:layout_gravity="center"
                    android:layout_marginLeft="20dp"
                    android:layout_marginRight="20dp"
                    android:layout_marginTop="30dp"
                    android:alpha="0.5"
                    android:background="@drawable/roundbutton"
                    android:gravity="center"
                    android:text="@string/aboutme"
                    android:textColor="@drawable/recbutcolor"
                    android:textSize="22sp"
                    android:textStyle="bold"/>
            </LinearLayout>
        </ScrollView>


    </FrameLayout>
</android.support.v4.widget.DrawerLayout>

Answer 3

To use a DrawerLayout, position your primary content view as the first child with a width and height of match_parent. Add drawers as child views after the main content view and set the layout_gravity appropriately. Drawers commonly use match_parent for height with a fixed width.

(Android 文档 link)

将以下行添加到您的相对布局中：

android:layout_gravity="left|start"

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