Question

我正在为我的Android应用程序构建Translucent Navigation bar。我单独尝试开发任务栏，然后打算将其包含在我的应用程序中。

我暂时不允许上传图片（因为我没有声誉），因此这里有一个我想为我的APP构建的例子：

我在MainActivity.java文件中收到错误。

我在以下代码行中收到错误：

        mDrawerToggle = new ActionBarDrawerToggle(this,Drawer,toolbar,R.string.navigation_drawer_open, R.string.navigation_drawer_close)

错误：

错误：（48,79）错误：找不到符号变量navigation_drawer_open

错误：（48,112）错误：找不到符号变量navigation_drawer_close

这是MainActivity.java文件的完整代码：

package sha.testing_sidebar;

import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;


public class MainActivity extends ActionBarActivity {

String TITLES [] = {"Home","Events","Mail","Blog","Attending"};
int ICONS [] = {R.drawable.ic_home,R.drawable.ericsson_2_png,R.drawable.ic_mqil_hdpi,R.drawable.ic_blog_2,R.drawable.ic_attending};

        String NAME = "Sharang Bharadwaj";
        String EMAIL = "sha.bh91@gmail.com";
        int PROFILE = R.drawable.sha1;

private Toolbar toolbar;

RecyclerView mRecyclerView;
RecyclerView.Adapter mAdapter;
RecyclerView.LayoutManager mLayoutManager;
DrawerLayout Drawer;

ActionBarDrawerToggle mDrawerToggle;

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

    mRecyclerView = (RecyclerView) findViewById(R.id.RecyclerView);
    mRecyclerView.setHasFixedSize(true);
    mAdapter = new sha.testing_sidebar.MyAdapter(TITLES,ICONS,NAME,EMAIL,PROFILE);

    mRecyclerView.setAdapter(mAdapter);
    mLayoutManager = new LinearLayoutManager(this);

    Drawer = (DrawerLayout) findViewById(R.id.DrawerLayout);
    mDrawerToggle = new ActionBarDrawerToggle(this,Drawer,toolbar,R.string.navigation_drawer_open, R.string.navigation_drawer_close) {
        @Override
        public void onDrawerOpened(View drawerView) {
            super.onDrawerOpened(drawerView);
            //actions upon opening slider
            //presently nothing
        }

        @Override
        public void onDrawerClosed(View drawerView) {
            super.onDrawerClosed(drawerView);
            //actions upon closing slider
            //presently nothing

        }
    };
    //Drawer Toggle Object made
        Drawer.setDrawerListener(mDrawerToggle);
        mDrawerToggle.syncState();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
    }
}

错误是

Answer 1

在strings.xml文件中添加以下内容

<string name="navigation_drawer_open">Drawer Open</string>
<string name="navigation_drawer_close">Drawer Closed</string>

之后它应该可以工作。

Answer 2

只需将其复制/粘贴到字符串文件中

<string name="navigation_drawer_open">Drawer Open</string>
<string name="navigation_drawer_close">Drawer Closed</string>

它们可能已经存在，如果为true，则两者都将以红色加下划线。如果是这样，请擦除现有的并复制/粘贴相同的两行。

错误：无法在Android Studio中解析navigation_drawer_open

2 个答案: