AlertDialog 创建简单的 弹出对话框

效果图：







一个 java文件，一个 xml布局文件 只有一个button

java文件代码：

public class Main extends Activity {


[code] 

private static final String tag = "==CrazyIt.org==";

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

final Builder b = new AlertDialog.Builder(this);

Button btn = (Button) findViewById(R.id.btn);

btn.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

// TODO Auto-generated method stub

b.setIcon(R.drawable.z1);

b.setTitle("标题");

b.setMessage("进入了对话框！");

b.setPositiveButton("确定",

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog,

int which) {

                // TODO Auto-generated method stub

Toast.makeText(Main.this, "点击确定按钮",

Toast.LENGTH_SHORT).show();

}

});

b.setNegativeButton("取消",

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog,

int which) {

                // TODO Auto-generated method stub

Toast.makeText(Main.this, "点击取消按钮",

Toast.LENGTH_SHORT).show();

}

});

b.setNeutralButton("aaa",

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog,

int which) {

                // TODO Auto-generated method stub

Toast.makeText(Main.this, "点击。。。按钮",

Toast.LENGTH_SHORT).show();

}

});

b.create().show();

}

});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.activity_main, menu);

return true;

}

}

[/code]

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }