[英]Programmatically change the layout color of layout
我試圖以編程方式更改布局顏色,但更改相對布局的顏色(嘗試使用線性布局,但未更改),但是無法更改它。
同樣,嘗試調試該應用程序也無濟於事,沒有與我的TAG相關的消息。
最初為布局着色后,應用程序保持靜止。
package com.test.intentdemo;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
//import android.os.SystemClock;
import android.widget.RelativeLayout;
import android.util.*;
import java.lang.Thread;
public class intentDemo extends Activity {
/** Called when the activity is first created. */
RelativeLayout lLayout;
public static final String TAG="MyActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lLayout = (RelativeLayout) findViewById(R.layout.main);
if (Log.isLoggable(TAG,0))
{
Log.e(TAG,"ERROR BEFORE");
Log.i(TAG,"INFO BEFORE");
Log.d(TAG,"DEBUG BEFORE");
lLayout.setBackgroundColor(Color.parseColor("#000000"));
//SystemClock.sleep(2000);
try
{
Thread.currentThread();
Thread.sleep(2000);
}
catch (Exception e)
{
//e.message();
}
Log.e(TAG,"ERROR AFTER");
Log.i(TAG,"INFO AFTER");
Log.d(TAG,"DEBUG AFTER");
}
}
}
lLayout = (RelativeLayout) findViewById(R.layout.main);
錯了 findViewById
需要一個View
的ID。 因此,將ID賦予RelativeLayout
,例如:
<RelativeLayout
android:id="@+id/the_id"
然后:
lLayout = (RelativeLayout) findViewById(R.id.the_id);
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.RelativeLayout;
public class intentDemo extends Activity {
public static final String TAG="MyActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
RelativeLayout lLayout = (RelativeLayout) findViewById(R.layout.the_id);
lLayout.setBackgroundColor(Color.parseColor("#000000"));
}
}
RelativeLayout lLayout = (RelativeLayout) findViewById(R.layout.the_id);
lLayout.setBackgroundColor(getResources().getColor(R.color.green_color));
如果您想使用顏色代碼-我們開始吧
your_layout_name.setBackgroundColor(Color.parseColor("Color Name"));
例:
linearLayoutInquiryYear.setBackgroundColor(Color.parseColor("#e3e3e3"));
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