Java 如何更改布局&;使用arraylist初始化
我想在单击特定项目时更改我的类和布局。例如,如果我从数组列表中单击“physical”,我希望它打开物理java类和物理xml布局。我该怎么做?正如您在下面看到的,我已经尝试过视图和开关/案例Java 如何更改布局&;使用arraylist初始化,java,android,arrays,layout,arraylist,Java,Android,Arrays,Layout,Arraylist,我想在单击特定项目时更改我的类和布局。例如,如果我从数组列表中单击“physical”,我希望它打开物理java类和物理xml布局。我该怎么做?正如您在下面看到的,我已经尝试过视图和开关/案例 import android.content.Intent; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import and
import android.content.Intent;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.support.v4.app.FragmentActivity;
import java.util.List;
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener{
private DrawerLayout drawerLayout;
private Toolbar toolbar;
private ListView listView;
private String[] planets;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_appbar);
toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
NavigationDrawerFragment drawerFragment = (NavigationDrawerFragment)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), toolbar);
drawerLayout=(DrawerLayout)findViewById(R.id.drawerLayout);
planets=getResources().getStringArray(R.array.planets);
listView=(ListView) findViewById(R.id.drawerList);
listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, planets));
listView.setOnItemClickListener(this);
}
@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
return super.onOptionsItemSelected(item);
}
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(this, planets[position] + " was selected", Toast.LENGTH_LONG).show();
selectItem(position);
selectItem2(view);
}
public void selectItem(int position) {
listView.setItemChecked(position, true);
setTitle(planets[position]);}
public void selectItem2 (View view){
switch (view.getId()) {
case 0:
Intent intent = new Intent(view.getContext(), physical_fragment.class);
startActivityForResult(intent, 0);}}
public void setTitle(String title){
getSupportActionBar().setTitle(title);
}
}
导入android.content.Intent;
导入android.support.v4.app.Fragment;
导入android.support.v4.app.FragmentActivity;
导入android.support.v4.app.FragmentManager;
导入android.support.v4.widget.DrawerLayout;
导入android.support.v7.app.AppActivity;
导入android.os.Bundle;
导入android.support.v7.widget.Toolbar;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.view.view;
导入android.view.Window;
导入android.view.WindowManager;
导入android.widget.AdapterView;
导入android.widget.ArrayAdapter;
导入android.widget.ListView;
导入android.widget.Toast;
导入android.support.v4.app.FragmentActivity;
导入java.util.List;
公共类MainActivity扩展AppCompativeActivity实现AdapterView.OnItemClickListener{
私人抽屉布局;
专用工具栏;
私有列表视图列表视图;
私人字符串[]行星;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
requestWindowFeature(窗口。功能\u无\u标题);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_全屏);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u main\u appbar);
工具栏=(工具栏)findViewById(R.id.app\u栏);
设置支持操作栏(工具栏);
getSupportActionBar().setDisplayShowHomeEnabled(true);
导航抽屉碎片抽屉碎片=(导航抽屉碎片)
getSupportFragmentManager().findFragmentById(R.id.fragment\u导航\u抽屉);
drawerFragment.setUp(R.id.fragment\u导航\u抽屉,(抽屉布局)findViewById(R.id.drawer\u布局),工具栏);
抽屉布局=(抽屉布局)findViewById(R.id.抽屉布局);
planets=getResources().getStringArray(R.array.planets);
listView=(listView)findViewById(R.id.DroperList);
setAdapter(新的ArrayAdapter(这个,android.R.layout.simple_list_item_1,planets));
setOnItemClickListener(this);
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(右菜单菜单菜单主菜单);
返回true;
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
//noinspection SimplifiableIf语句
返回super.onOptionsItemSelected(项目);
}
public void onItemClick(AdapterView父对象、视图、整型位置、长id){
Toast.makeText(这是行星[position]+“已被选中”,Toast.LENGTH_LONG.show();
选择项目(位置);
选择项目2(视图);
}
public void selectItem(内部位置){
setItemChecked(位置,true);
setTitle(行星[位置];}
public void selectItem2(视图){
开关(view.getId()){
案例0:
Intent Intent=新的Intent(view.getContext(),physical_fragment.class);
startActivityForResult(intent,0);}
公共无效集合标题(字符串标题){
getSupportActionBar().setTitle(标题);
}
}
您可能不想比较视图的id
,因为列表中的所有视图都将使用android.R.layout.simple\u list\u item\u 1
它们都将具有相同的id
您可以考虑通过<代码>位置<代码>,并将其进行比较。
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(this, planets[position] + " was selected", Toast.LENGTH_LONG).show();
selectItem(position);
selectItem2(position);
}
public void selectItem2 (int position) {
switch (position) {
case 0:
Intent intent = new Intent(MainActivity .this, physical_fragment.class);
startActivityForResult(intent, 0);
break;
}
}
public void onItemClick(AdapterView父视图、视图视图、整型位置、长id){
Toast.makeText(这是行星[position]+“已被选中”,Toast.LENGTH_LONG.show();
选择项目(位置);
选择项目2(位置);
}
public void selectItem2(内部位置){
开关(位置){
案例0:
意向意向=新意向(MainActivity.this,physical_fragment.class);
startActivityForResult(意向,0);
打破
}
}
像这样的事情应该会让你开始。然而,您可能最终希望检查所选项目的内容,例如字符串资源的实际位置,然后获取该id,以防您决定切换列表项目或以其他方式修改它们。您可能不希望比较视图的id
,因为所有视图都在您的列表将使用android.R.layout.simple\u list\u item\u 1
它们将具有相同的id
您可以考虑通过<代码>位置<代码>,并将其进行比较。
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(this, planets[position] + " was selected", Toast.LENGTH_LONG).show();
selectItem(position);
selectItem2(position);
}
public void selectItem2 (int position) {
switch (position) {
case 0:
Intent intent = new Intent(MainActivity .this, physical_fragment.class);
startActivityForResult(intent, 0);
break;
}
}
public void onItemClick(AdapterView父视图、视图视图、整型位置、长id){
Toast.makeText(这是行星[position]+“已被选中”,Toast.LENGTH_LONG.show();
选择项目(位置);
选择项目2(位置);
}
public void selectItem2(内部位置){
开关(位置){
案例0:
意向意向=新意向(MainActivity.this,physical_fragment.class);
startActivityForResult(意向,0);
打破
}
}
像这样的事情应该会让你开始。但是,您可能最终希望检查所选项目的内容,例如字符串资源的实际位置,然后获取该id,以防您决定切换列表项目或以其他方式修改它们。您希望view.getId()
返回0吗?那可能不对。您的开关中还应该有一个break
语句和一个default
案例
有什么想法吗?您希望<