[我的工具栏] [1]
有人有任何解决方案吗?
答案 0 :(得分:2)
我见过你的工具栏。 这是我的解决方案:
根据需要命名,例如,我将其命名为menu_example。
<强> menu_example.xml 强>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_addfav"
android:title=""
app:showAsAction="always"
android:icon="@drawable/YOUR_ADDFAV_DRAWABLE" />
</menu>
<强> activity_example.java 强>
package com.example;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
public class activity_example extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Layout xml init
setContentView(R.layout.activity_example);
//Actionbar
//Back button
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
//Inflate the menu
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_example, menu);
return true;
}
//Handling Action Bar button click
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
//Back button
case android.R.id.home:
//If this activity started from other activity
finish();
/*If you wish to open new activity and close this one
startNewActivity();
*/
return true;
case R.id.action_addfav:
//addfav (heart icon) was clicked, Insert your after click code here.
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void startNewActivity(){
Intent intent = new Intent(this,ACTIVITY_YOU_WANT_TO_START.class);
startActivity(intent);
finish();
}
}
(您可以将根布局更改为您想要的任何布局)
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- YOUR LAYOUT HERE -->
</RelativeLayout>
<强> styles.xml 强>
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<! -- Parent got to have actionbar in order for toolbat to appear -->
</style>
如果您希望工具栏仅在一个特定活动中,请查看:Apply a theme to an activity in Android?
答案 1 :(得分:0)
您需要检查 R.id.img_bar_back 。天气它是您正在寻找的ImageView ID或其他东西。这可能是由于查找错误的视图ID而发生的。
答案 2 :(得分:0)
SELECT MIN(cr.cr_id) AS cr_id, cr.acc_id
FROM cr
WHERE acc_id IN (100, 200)
AND cr.start_time IN
(SELECT MAX(sub.start_time)
FROM cr sub
WHERE cr.acc_id = sub.acc_id)
GROUP BY cr.acc_id