小编Rav*_*avi的帖子

当我制作Android设计时,它给我的间距,就像我们说在网上填充我如何使它100%宽度.

这是我的布局代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:scaleType="fitXY"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.mobilink.mobilink.MainActivity">

<LinearLayout
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_alignParentTop="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true"
    android:weightSum="1">

    <LinearLayout
        android:background="#ff00cc70"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.25"></LinearLayout>

    <LinearLayout
        android:background="#ff0087cc"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.20"></LinearLayout>
    <LinearLayout
        android:background="#ffff1a27"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.20"></LinearLayout>
    <LinearLayout
    android:background="#ff3444ff"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="0.20"></LinearLayout>
    <LinearLayout
        android:background="#ff0019ff"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.20"></LinearLayout>
</LinearLayout>

您好我的代码有问题.我想在后台播放音乐,这将与IntentServiceAndroid一起运行.但是如果我实现这条线,我的SDk会给我一个错误.

Radio.java

public class Radio extends Activity implements OnCompletionListener,
OnPreparedListener, OnErrorListener, OnBufferingUpdateListener, MusicFocusable, ViewFactory {

....

play.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View btn) {
            if (!playState) {
                play.setImageResource(R.drawable.stop);
                handler.postDelayed(handlePlayRequest, 300);

                 startService(new Intent(this, MyService.class));
                "Here is Error 1"

            }
            else {
                play.setImageResource(R.drawable.play);
                status.setText("Drücke Play!");
                handler.postDelayed(handlePlayRequest, 300);

                stopService(new Intent(this, MyService.class));
                 "Here is Error 2"

            }
        }

和

MyService.java

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

public class MyService extends Service {
private static final …

我AppCompat在教会应用程序中使用库,但我的菜单图标没有出现ActionBar.

public class MainActivity extends ActionBarActivity {

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

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // toggle nav drawer on selecting action bar app icon/title
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        // Handle action bar actions click
        switch (item.getItemId()) {
        case R.id.action_settings:
            return true;

         case R.id.menu_item_share:
            shareApp(); 
            return true;  

        case R.id.menu_item_about:
            Intent intentAbout = new Intent(MainActivity.this, AboutActivity.class);
            startActivity(intentAbout);
            return …

如下所示创建一个数组作为列表项的no我假设你有五个项目:

int[] color_arr={Color.BLUE,Color.CYAN,Color.YELLOW,Color.GREEN,Color.RED};

并在getView()自定义适配器的方法中使用它如下: -

public View getView(int position, View convertView, ViewGroup parent)
     {

     LayoutInflater inflater = getLayoutInflater();
     View row=convertView;

     row = inflater.inflate(R.layout.listview_custome, parent, false);
     row.setBackgroundColor(color_arr[position]);// this set background color

     TextView textview = (TextView) row.findViewById(R.id.tv_list);
     ImageView imageview = (ImageView) row.findViewById(R.id.iv_list);

     textview.setText(data_text[position]);
     imageview.setImageResource(data_image[position]);

     return (row);

    }

我的问题是,如果列表项中有超过5个项目,listview中每行可能有5种不同的颜色吗？