android_学习练习2
main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextViewandroid:id="@+id/show_TextView" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /><Button android:id="@+id/Click_Button"android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="点击" /> </LinearLayout>
ButtonViewTest.java
package com.hoocy;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;public class ButtonViewTest extends Activity { /** Called when the activity is first created. */private TextView show;private Button press; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); show=(TextView) findViewById(R.id.show_TextView); press = (Button) findViewById(R.id.Click_Button); press.setOnClickListener(new Button.OnClickListener(){public void onClick(View v) {show.setText("hi.welcome you! www.163.com");} }); }}
练习2
main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextViewandroid:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/TextView_Guide" android:textSize="25px" android:text="@string/advice" /><TextViewandroid:layout_height="wrap_content"android:layout_width="fill_parent"android:id="@+id/TextView_youChoiceShow"android:textSize="25px"/> <CheckBox android:layout_height="wrap_content"android:layout_marginTop="100px"android:layout_marginLeft="90px"android:id="@+id/CheckBox_Accept"android:layout_width="120pt"></CheckBox> <Buttonandroid:layout_height="wrap_content"android:layout_marginLeft="90px"android:id="@+id/Button_OK"android:text="确定"android:layout_width="90px"/></LinearLayout>
AgreeTest.java
package com.hoocy;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.CheckBox;import android.widget.TextView;public class AgreeTest extends Activity {private TextView showAdvice,yourChoiceshow;private CheckBox iAccept;private Button ok; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); showAdvice = (TextView) findViewById(R.id.TextView_Guide); yourChoiceshow=(TextView) findViewById(R.id.TextView_youChoiceShow); iAccept=(CheckBox) findViewById(R.id.CheckBox_Accept); ok=(Button) findViewById(R.id.Button_OK); CharSequence titleString = getString(R.string.allOK); iAccept.setHint(titleString); iAccept.setHintTextColor(Color.RED); iAccept.setChecked(false); ok.setEnabled(false); iAccept.setOnClickListener(new CheckBox.OnClickListener(){public void onClick(View v) {if(iAccept.isChecked()){ok.setEnabled(true);yourChoiceshow.setText(R.string.accepte);}else{ok.setEnabled(false);yourChoiceshow.setText(R.string.Notaccept);}} }); ok.setOnClickListener(new Button.OnClickListener(){public void onClick(View v) {showAdvice.setText(R.string.accepte);} }); }}
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