今天做的就是在界面输入用户名和密码，如果正确的话显示登陆成功，否则就是失败了！
界面很挫，就是很挫！
输入用户名：Android
密码：2014
结果如下：
接着重置，返回原来图片！
如果密码错误呢？
点重置返回原来界面！
接着长按图标按钮，就出现动态textview！
具体代码如下：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.practice2.MainActivity$PlaceholderFragment" >
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="35dp"
android:layout_marginTop="34dp"
android:ems="10"
android:gravity="center" />
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="35dp"
android:layout_marginTop="34dp"
android:ems="10"
android:gravity="center"
android:inputType="textPassword" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="25dp"
android:gravity="center"
android:text="您好，请输入用户名和密码" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="0.53"
android:text="重置" />
<ImageButton
android:id="@+id/imageButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.47"
android:src="@drawable/ic_launcher" />
</LinearLayout>
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:text="" />
</LinearLayout>
后代：
package com.example.practice2;
import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
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.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
EditText account = null;
EditText code = null;
ImageButton ibtn = null;
Button btn = null;
TextView information = null;
TextView mcont = null;
Context cont = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
account = (EditText) findViewById(R.id.editText1);
code = (EditText) findViewById(R.id.editText2);
ibtn = (ImageButton) findViewById(R.id.imageButton1);
btn = (Button) findViewById(R.id.button1);
information = (TextView) findViewById(R.id.textView1);
mcont =(TextView) findViewById(R.id.textView2);
cont = this;
mcont = new TextView(cont);
mcont.setText("万万没想到");
//ibtn = new ImageButton(this);
ibtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String username = ((EditText)findViewById(R.id.editText1)).getText().toString();
String pwd = ((EditText)findViewById(R.id.editText2)).getText().toString();
if(username.equals("android")&&pwd.equals("2014")){
ibtn.setImageDrawable(getResources().getDrawable(R.drawable.state1));
account.setVisibility(View.GONE);
code.setVisibility(View.GONE);
information.setText("用户名密码正确");
}
else{
ibtn.setImageDrawable(getResources().getDrawable(R.drawable.state2));
account.setVisibility(View.GONE);
code.setVisibility(View.GONE);
information.setText("用户名密码错误");
}
}
});
ibtn.setOnLongClickListener(new OnLongClickListener(){
@Override
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
LinearLayout mLinearLayout = (LinearLayout)findViewById(R.id.LinearLayout1);
mcont = new TextView(cont);
mcont.setText("万万没想到");
mLinearLayout.addView(mcont);
//mLinearLayout.setLayoutParams(new RelativeLayout.LayoutParams(-1, -1));
//TextView mView = new TextView(this);
//mView.setId(2);
//mView.setText("this is a test text!");
//RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(
// -2, -2);
// layoutParams.setMargins(100, 100, 100, 100);
//layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, -1);
//Toast.makeText(cont, "万万没想到", Toast.LENGTH_LONG).show();
//mLinearLayout.addView(mcont);
return true;
}
});
btn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
ibtn.setImageDrawable(getResources().getDrawable(R.drawable.ic_launcher));
information.setText("您好，请输入用户名和密码");
account.setVisibility(0);
code.setVisibility(0);
account.setHint("username");
code.setHint("password");
account.setText("");
code.setText("");
}
});
}
@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);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}