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Android--Activity在跳转时携带数据
首先看看两种传递方法示例：（一个简单姻缘计算器）
主Activity
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void click(View v){
Intent intent = new Intent(this, SecondActivity.class);
//把数据封装至intent对象中
// intent.putExtra("malename", "张三");
// intent.putExtra("femalename", "芙蓉姐姐");
//把数据封装至bundle对象中
Bundle bundle = new Bundle();
bundle.putString("malename", "张三");
bundle.putString("femalename", "芙蓉姐姐");
//把bundle对象封装至intent对象中
intent.putExtras(bundle);
startActivity(intent);
}
}
import java.util.Random;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class SecondActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
Intent intent = getIntent();
//从intent对象中把封装好的数据取出来
// String maleName = intent.getStringExtra("malename");
// String feMaleName = intent.getStringExtra("femalename");
Bundle bundle = intent.getExtras();
String maleName = bundle.getString("malename");
String feMaleName = bundle.getString("femalename");
Random rd = new Random();
int yinyuan = rd.nextInt(100);
TextView tv = (TextView) findViewById(R.id.tv);
tv.setText(maleName + "和" + feMaleName + "的姻缘值为" + yinyuan);
}
}
activity_main.xml:
<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: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=".MainActivity" android:orientation="vertical">
<textview android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="这是姻缘计算器，很准的哟">
<edittext android:id="@+id/et_malename" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="张三">
<edittext android:id="@+id/et_femalename" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="芙蓉姐姐"><button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="计算" android:onclick="click"></button></edittext></edittext></textview></linearlayout>
activity_second.xml：
<relativelayout 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: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=".MainActivity">
<textview android:id="@+id/tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="这是第二个Activity">
</textview></relativelayout>