Question

我已尝试堆栈溢出中的每个答案，但没有任何作用。代码如下，请告诉我是否遗漏了任何内容：

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.graphics.Palette;
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.widget.ImageView;

import com.suleiman.material.R;
import com.suleiman.material.adapter.SimpleRecyclerAdapter;
import com.suleiman.material.model.VersionModel;

import java.util.ArrayList;
import java.util.List;

public class AnimateToolbar extends AppCompatActivity {
    CollapsingToolbarLayout collapsingToolbar;
    RecyclerView recyclerView;
    int mutedColor = R.attr.colorPrimary;
    SimpleRecyclerAdapter simpleRecyclerAdapter;

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

         Toolbar toolbar = (Toolbar) findViewById(R.id.anim_toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayShowHomeEnabled(true);

        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        getSupportActionBar().setDefaultDisplayHomeAsUpEnabled(true);


        collapsingToolbar = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
        collapsingToolbar.setTitle("Suleiman Ali Shakir");

        ImageView header = (ImageView) findViewById(R.id.header);

        Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
                R.drawable.header);

        Palette.from(bitmap).generate(new Palette.PaletteAsyncListener() {
            @Override
            public void onGenerated(Palette palette) {

                mutedColor = palette.getMutedColor(R.attr.colorPrimary);
                collapsingToolbar.setContentScrimColor(mutedColor);
            }
        });

        recyclerView = (RecyclerView) findViewById(R.id.scrollableview);

        recyclerView.setHasFixedSize(true);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(linearLayoutManager);

        List<String> listData = new ArrayList<String>();
        int ct = 0;
        for (int i = 0; i < VersionModel.data.length * 2; i++) {
            listData.add(VersionModel.data[ct]);
            ct++;
            if (ct == VersionModel.data.length) {
                ct = 0;
            }
        }

        if (simpleRecyclerAdapter == null) {
            simpleRecyclerAdapter = new SimpleRecyclerAdapter(listData);
            recyclerView.setAdapter(simpleRecyclerAdapter);
        }

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_animate_toolbar, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                finish();
                return true;
            case R.id.action_settings:
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

我的xml代码是：

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="192dp"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleMarginEnd="64dp"
            app:expandedTitleMarginStart="48dp"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:id="@+id/header"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@drawable/header"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                app:layout_collapseMode="parallax" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/anim_toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

        </android.support.design.widget.CollapsingToolbarLayout>

    </android.support.design.widget.AppBarLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/scrollableview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    <android.support.design.widget.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        android:clickable="true"
        android:src="@drawable/ic_action_add"
        app:layout_anchor="@+id/appbar"
        app:layout_anchorGravity="bottom|right|end" />

</android.support.design.widget.CoordinatorLayout>

android.R.id.home按钮没有出现在工具栏中。我已经使用过每一件事，但后来也没有用。请帮忙。

Answer 1

这是你如何设置.. 相应地使用它

Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);
setSupportActionBar(toolbar);

toolbar.setNavigationIcon(R.drawable.ic_good);
toolbar.setTitle("Title");
toolbar.setSubtitle("Sub");
toolbar.setLogo(R.drawable.ic_launcher);

Answer 2

这也有帮助。

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

ActionBar ab = getSupportActionBar();
ab.setHomeAsUpIndicator(R.drawable.ic_home);
ab.setDisplayHomeAsUpEnabled(true);

Answer 3

有时工具栏会落后。因此，您需要在[toolbar object].bringToFront();方法中调用以下方法。这将解决问题

webpack-dev-server --config webpack.config.json

主页图标未出现在工具栏上

3 个答案: