【实验】电话拨号、动态添加按钮

package com.example.lab2;

import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridLayout;
import android.widget.GridLayout.LayoutParams;
import android.widget.GridView;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity2 extends Activity {

Context context;
GridLayout gl;
Button btn;
String temp;
TextView tv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);

init(); //初始化

int count=1;
final Button[] btn = new Button[30];

for(int i=0;i<5;i++)
for(int j=0;j<3;j++) {
System.out.println("count:"+count);
btn[i*3 + j] = new Button(this);
btn[i*3 + j].setWidth(100);

switch(i*3 + j)
{
case 9:btn[i*3 + j].setText("*");
break;
case 10:btn[i*3 + j].setText("0");
break;
case 11:btn[i*3 + j].setText("#");
break;
case 12:btn[i*3 + j].setText("清除");
break;
case 13:btn[i*3 + j].setText("拨打");
break;
case 14:btn[i*3 + j].setText("返回");
break;
default:btn[i*3 + j].setText(String.valueOf(count));
break;
}

count++;
GridLayout.Spec rowSpec = GridLayout.spec(i);     //设置它的行和列
GridLayout.Spec columnSpec=GridLayout.spec(j);
GridLayout.LayoutParams params=new GridLayout.LayoutParams(rowSpec,columnSpec);
params.setGravity(Gravity.LEFT);
gl.addView(btn[i*3 + j],params);

final int number = i*3+j;
OnClickListener listener = new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
String num="";
switch(number)
{
case 9:
num = "*";
temp = tv.getText().toString();
tv.setText(temp + num);
break;
case 10:
num = "0";
temp = tv.getText().toString();
tv.setText(temp + num);
break;
case 11:
num = "#";
temp = tv.getText().toString();
tv.setText(temp + num);
break;
case 12:
tv.setText("");
break;
case 13:
String PhoneNumber = tv.getText().toString();
Intent intent = new Intent(Intent.ACTION_CALL,Uri.parse("tel:" + PhoneNumber));
startActivity(intent);
break;
case 14:
int len = tv.getText().toString().length();
String substr = tv.getText().toString().substring(0, len-1);
tv.setText(substr);
break;
default:
num = String.valueOf(number+1);
temp = tv.getText().toString();
tv.setText(temp + num);
break;
}
//Toast.makeText(MainActivity2.this, "num", Toast.LENGTH_SHORT);
}
};
btn[number].setOnClickListener(listener);

}
}

public void init()
{
gl = (GridLayout)findViewById(R.id.gl);
context = MainActivity2.this;
tv = (TextView)findViewById(R.id.tv);
}

}

<LinearLayout 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:orientation="vertical"
>

<TextView
android:id="@+id/tv"
android:maxLines="2"
android:textSize="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

<GridLayout
android:id="@+id/gl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:columnCount="3"
android:rowCount="5"
></GridLayout>

</LinearLayout>