布局activity_main.xml
<?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:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!--标题栏-->
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:text="自定义标题" />
</android.support.v7.widget.Toolbar>
<!--大图-->
<ImageView
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="@mipmap/c_head2" />
<!--选项卡-->
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#80ffffff"
app:tabIndicatorColor="@color/colorAccent"
app:tabMode="scrollable"
app:tabSelectedTextColor="@color/colorAccent"
app:tabTextColor="@android:color/black" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:overScrollMode="never"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:id="@+id/ll_sc_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"></LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
代码 MainActivity.java
package com.vianet21.nestedscrollview;
import android.support.design.widget.TabLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private List<String> mData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initData(1);
initView();
}
private void initData(int pager) {
mData = new ArrayList<>();
for (int i = 1; i < 50; i++) {
mData.add("pager" + pager + " 第" + i + "个item");
}
Log.e("*****", mData.toString());
}
private void initView() {
//设置ToolBar
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("");
toolbar.setNavigationIcon(R.mipmap.arrow_back);
setSupportActionBar(toolbar);//替换系统的actionBar
//设置TabLayout
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);
for (int i = 1; i < 10; i++) {
tabLayout.addTab(tabLayout.newTab().setText("TAB" + i));
}
//TabLayout的切换监听
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
initData(tab.getPosition() + 1);
setScrollViewContent();
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
setScrollViewContent();
}
/**
* 刷新ScrollView的内容
*/
private void setScrollViewContent() {
//NestedScrollView下的LinearLayout
LinearLayout layout = (LinearLayout) findViewById(R.id.ll_sc_content);
layout.removeAllViews();
for (int i = 0; i < mData.size(); i++) {
View view = View.inflate(MainActivity.this, R.layout.item_layout, null);
((TextView) view.findViewById(R.id.tv_info)).setText(mData.get(i));
//动态添加 子View
layout.addView(view, i);
}
}
}
item_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/tv_info"
android:layout_width="match_parent"
android:layout_height="50dp" />
</LinearLayout>
代码网上都有,本文主要记录我遇到的问题:
1,代码编写完了发现没问题,可是运行奔溃,debug发现setSupportActionBar()方法导致,错误日志:
Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
一般有2种情况:
第一,导包错误 import android.support.v7.widget.Toolbar;
;
第二,用了此方法的activity要继承AppCompatActivity(ActionBarActivity也可以),并且需要修改theme,
AndroidManifest.xml
<activity android:name=".MainActivity"
android:theme="@style/AppTheme.Base">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
styles.xml
<style name="AppTheme.Base">
<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>
</style>
2,错误日志
这种情况是由于依赖库的版本不一致导致的,把build.gradle中的 v4 v7 和其他依赖库版本改为一致即可:
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'