Android程序初体验

第一个程序的实现的最终功能是：

点击"正确"或者"错误"会得到一个是否正确的提示。

直接上效果图。

 

 

此次涉及代码编写的文件有4个：

package com.Kyleapp2;

 

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;

 

 

public
class MainActivity<QuizActivity> extends ActionBarActivity {

 

    private Button mTrueButton;

    private Button mFalseButton;

@Override

 

protected
void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mTrueButton = (Button)findViewById(R.id.true_button);

mFalseButton = (Button)findViewById(R.id.false_button);

mTrueButton.setOnClickListener(new View.OnClickListener() {

    @Override

    public
void onClick(View v) {

    // Does nothing yet, but soon!

        Toast.makeText

        (MainActivity.this, R.string.correct_toast,

        Toast.LENGTH_SHORT).show();

    }

});

 

mFalseButton.setOnClickListener(new View.OnClickListener() {

    @Override

    public
void onClick(View v) {

    // Does nothing yet, but soon!

        Toast.makeText(MainActivity.this, R.string.incorrect_toast,

                Toast.LENGTH_SHORT).show();

    }

});

}

 

 

@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;

}

 

@Override

public
boolean onOptionsItemSelected(MenuItem item) {

// Handle action bar item clicks here. The action bar will

// automatically handle clicks on the Home/Up button, so long

// as you specify a parent activity in AndroidManifest.xml.

int id = item.getItemId();

if (id == R.id.action_settings) {

return
true;

}

return
super.onOptionsItemSelected(item);

}

}

 

<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:gravity="center"

    android:orientation="vertical"
>

 

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:padding="24dp"

android:text="@string/question" />

 

<LinearLayout

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:orientation="horizontal"
>

 

        <Button

        android:id="@+id/true_button"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/true_button" />

        

        <Button

        android:id="@+id/false_button"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/false_button"
/>

 

    </LinearLayout>

 

         

</LinearLayout>

 

 

 

*/

public
static
final
int abc_shareactionprovider_share_with_application=0x7f0a000b;

public
static
final
int action_settings=0x7f0a000f;

public
static
final
int app_name=0x7f0a000d;

public
static
final
int correct_toast=0x7f0a0012;

public
static
final
int false_button=0x7f0a0011;

public
static
final
int incorrect_toast=0x7f0a0013;

public
static
final
int question=0x7f0a000e;

public
static
final
int true_button=0x7f0a0010;

<?xml
version="1.0"
encoding="utf-8"?>

<resources>

 

<string
name="app_name">App2</string>

<string
name="question">贵州是个美丽的地方？</string>

<string
name="action_settings">Settings</string>

 

<string
name="true_button">正确</string>

<string
name="false_button">错误</string>

 

<string
name="correct_toast">Correct!</string>

<string
name="incorrect_toast">Incorrect!</string>

 

</resources>

 

布局预览

 

总结：

    此过程，只需要关注以上四个文件。一下是它们各自的作用。

相当于我们的主程序文件，也就是"main.c"

显示的字符串信息在这里

 

程序界面控件在这里

 

这个不需要我们管，系统自动生成的