android - 抽屉导航图标不会替换插入符号

Question

我正在尝试实现一个带有自定义抽屉图标的简单抽屉导航。

• 我想要的 - 使用自定义抽屉图标而不是向上插入符号。
• 有什么问题- 自定义图标未显示。这是始终可见的“向上”插入符号。

• 我做了什么-

• 使用 Android studio 创建了一个 NavDrawer 项目。

• 在 Stackoverflow 上搜索了类似的问题。我有 onPostCreate() 方法的引用，但我已经处理好了。

• 使用 Android 示例应用来运行项目。

• 查看图片- 查看左上角。向上插入符是我想用我的图标替换的内容

主要 Activity

包 com.deep.wealthtrackernew;

    import android.content.res.Configuration;
    import android.support.v4.widget.DrawerLayout;
    import android.support.v7.app.ActionBarActivity;
    import android.os.Bundle;
    import android.support.v4.app.ActionBarDrawerToggle;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.widget.ListView;

    import java.util.List;


    public class MainActivity extends ActionBarActivity {

        private ListView listView;
        private DrawerLayout drawerLayout;
        private ActionBarDrawerToggle actionBarDrawerToggle;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            listView = (ListView) findViewById(R.id.left_drawer);
            drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
            actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.drawable.ic_drawer,
                    R.string.open_drawer, R.string.close_drawer) {

                @Override
                public void onDrawerOpened(View drawerView) {
                    super.onDrawerOpened(drawerView);
    //                getActionBar().setTitle();
                    supportInvalidateOptionsMenu();
                }

                @Override
                public void onDrawerClosed(View drawerView) {
                    super.onDrawerClosed(drawerView);
                    getSupportActionBar().setTitle("Wealth Tracker");
                    supportInvalidateOptionsMenu();
                }
            };

            drawerLayout.setDrawerListener(actionBarDrawerToggle);

            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setHomeButtonEnabled(true);
        }

        @Override
        protected void onPostCreate(Bundle savedInstanceState) {
            super.onPostCreate(savedInstanceState);
            actionBarDrawerToggle.syncState();
        }

        @Override
        public void onConfigurationChanged(Configuration newConfig) {
            super.onConfigurationChanged(newConfig);
            actionBarDrawerToggle.onConfigurationChanged(newConfig);
        }

        @Override
        public boolean onPrepareOptionsMenu(Menu menu) {
            // If the nav drawer is open, hide action items related to the content view
            boolean drawerOpen = drawerLayout.isDrawerOpen(listView);
    //        menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
            return super.onPrepareOptionsMenu(menu);
        }

        @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.

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

            int id = item.getItemId();

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

            return super.onOptionsItemSelected(item);
        }
    }

Answer 1

在您的主要 Activity oncreate 中，在 setContentView 之后立即执行此操作:

  //if you use support action bar it is
 ActionBar actionBar=getSupportActionBar();
    actionBar.setHomeAsUpIndicator(R.drawable.newIcon);
 //if you are not using support action bar it is
ActionBar actionBar=getActionBar();
    actionBar.setHomeAsUpIndicator(R.drawable.newIcon);