我有一个观点:
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<EditText
android:id="@+id/textLOG"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/textView1"
android:ems="10"
android:inputType="textMultiLine"
android:scrollbars="vertical" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="17dp"
android:text="@string/systemStarted"
/>
</RelativeLayout>
MainActivity.java
public class MainActivity extends Activity
{
@Override
protected void onCreate( Bundle savedInstanceState )
{
super.onCreate( savedInstanceState );
setContentView( R.layout.activity_main );
Globals.getInstance().setParent( 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.main, menu );
return true;
}
}
以及每秒向视图发送文本的服务。
public class CameraService extends Service
{
private final long mDelay = 0;
private final long mPeriod = 1000;
private final String LOGTAG = "BootDemoService";
private Timer mTimer;
private class LogTask extends TimerTask
{
public void run()
{
Log.i( LOGTAG, "scheduled" );
Globals.getInstance().addToLog( new Date().toString() );
}
}
private LogTask mLogTask;
@Override
public IBinder onBind( final Intent intent )
{
return null;
}
@Override
public void onCreate()
{
super.onCreate();
Log.i( LOGTAG, "created" );
mTimer = new Timer();
mLogTask = new LogTask();
}
@Override
public void onStart( final Intent intent, final int startId )
{
super.onStart( intent, startId );
Log.i( LOGTAG, "started" );
mTimer.schedule( mLogTask, mDelay, mPeriod );
}
}
通过这个单身人士:
public class Globals
{
private Activity parent;
private static Globals instance = null;
public static Globals getInstance()
{
if( instance == null )
{
instance = new Globals();
}
return instance;
}
public Globals()
{
super();
}
public void setParent( Activity parent )
{
this.parent = parent;
}
public void addToLog( String o )
{
if( parent != null )
{
TextView text = (EditText)parent.findViewById( R.id.textLOG );
text.setText( text.getText() + "\n" + o );
}
}
}
但文本从未显示在视图中。
- 如何将文本从服务发送到视图?