[英]GetExtra PutExtra
Ok So i want to pass values from One activity to another using getextrand putextra method. 好的,所以我想使用getextrand putextra方法将值从一个活动传递到另一个活动。
In Second Activity in which I want to receive data is full of contents like Buttons and Text view. 在我想接收数据的第二活动中,充满了诸如按钮和文本视图之类的内容。 and i want to set that certain value which i have received from MainActivity to a particular text box.
我想将我从MainActivity收到的某个值设置为特定的文本框。
setContenView(R.id.intent)
is the easiest one method to show a string but what if I want to Set this value to one or more textview. 是显示字符串的最简单的一种方法,但是如果我想将此值设置为一个或多个textview,该怎么办。 My code is here
我的代码在这里
MainActivity 主要活动
package com.prashant.cookbook;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
static String Message_send="Prashant";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
EditText et=(EditText)findViewById(R.id.editText1);
Button send=(Button)findViewById(R.id.send);
final Intent msg_send= new Intent(this,Second.class);
String MSG= et.getText().toString();
msg_send.putExtra(Message_send, MSG);
send.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startActivity(msg_send);
}
});
}
@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;
}
} }
SecondAvtivity SecondAvtivity
package com.prashant.cookbook;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.widget.TextView;
public class Second extends Activity {
private TextView tv;
private Intent rcv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
tv = (TextView) findViewById(R.id.msg_show);
rcv = getIntent();
String Show_msg;
Show_msg=rcv.getStringExtra(MainActivity.Message_send);
tv.setText(Show_msg);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.second, menu);
return true;
}
} }
but when I run this code I got nothing but a blank second Activity Not even a default text 但是当我运行这段代码时,我什么也没有,只有空白的第二个活动,甚至没有默认文本
get Value entered by user in EditText on Button click and then use msg_send.putExtra
for placing value in Intent as: 获取用户在单击按钮时在EditText中输入的值,然后使用
msg_send.putExtra
将值放置在Intent中,如下所示:
send.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String MSG= et.getText().toString(); //<< get value from EditText here
msg_send.putExtra(Message_send, MSG);
startActivity(msg_send);
}
});
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