<pre name="code" class="java">
package com.example.tryto;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
public class MainActivity extends Activity {
private int top , left , right ,bottom;
private LinearLayout.LayoutParams tt = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
private static boolean isChange = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.a);
final Button one = (Button)findViewById(R.id.one);
one.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(!isChange){
one.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
isChange = true;
}else{
one.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));
isChange = false;
}
}
});
final Button up = (Button)findViewById(R.id.up);
up.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.d("top", top+"");
tt.setMargins(left, top, right, bottom);
top--;bottom--;
up.setLayoutParams(tt);
}
});
final Button down =(Button)findViewById(R.id.down);
down.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
tt.setMargins(left, top , right, bottom);
top++;bottom++;
down.setLayoutParams(tt);
}
});
final Button r = (Button)findViewById(R.id.right);
r.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
tt.setMargins(left, top , right, bottom);
right++;left++;
r.setLayoutParams(tt);
}
});
final Button l = (Button)findViewById(R.id.left);
l.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
tt.setMargins(left, top , right, bottom);
left--;right--;
l.setLayoutParams(tt);
}
});
}
}
上面是利用代碼控制UI,獲得組件的引用,然後調用相關辦法就行了,對於不時變化的UI控件可以採用JAVA代碼進行控制,該程序只有6個按鈕,第一個按鈕能改變其自身的佈局方式,而上下左右四個按鈕能改變組件的填充空白值。最後一個只是爲了對比,沒有實際意義
其實我們也可以不針對UI組件單獨設置,可以針對佈局管理器來實現同樣的效果
以下是修改的源碼
package com.example.tryto;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
public class MainActivity extends Activity {
private int top , left , right ,bottom;
private LinearLayout.LayoutParams tt = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
private static boolean isChange = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.a);
final LinearLayout Linear = (LinearLayout)findViewById(R.id.root);
final Button one = (Button)findViewById(R.id.one);
one.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(!isChange){
one.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
isChange = true;
}else{
one.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));
isChange = false;
}
}
});
final Button up = (Button)findViewById(R.id.up);
up.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
tt.setMargins(left, top, right, bottom);
top--;bottom--;
Linear.setLayoutParams(tt);
}
});
final Button down =(Button)findViewById(R.id.down);
down.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
tt.setMargins(left, top , right, bottom);
top++;bottom++;
Linear.setLayoutParams(tt);
}
});
final Button r = (Button)findViewById(R.id.right);
r.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
tt.setMargins(left, top , right, bottom);
right++;left++;
Linear.setLayoutParams(tt);
}
});
final Button l = (Button)findViewById(R.id.left);
l.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
tt.setMargins(left, top , right, bottom);
left--;right--;
Linear.setLayoutParams(tt);
}
});
}
}