項目下載下傳連結:點選下載下傳吧
1:項目架構
2:後端布局代碼
①:MainActivity.class
package cn.cg.intenttext;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
/*
顯示意圖點選事件
*/
public void btn_1(View view) {
//通過顯示意圖打開
Intent intent=new Intent(MainActivity.this,SecondActivity.class);
startActivity(intent);
}
/*
隐式意圖點選事件
*/
public void btn_2(View view) {
Intent intent=new Intent();
intent.setAction("android.intent.action.ThireActivity");
startActivity(intent);
}
/*
傳遞資料
*/
public void btn_TranSmitData(View view) {
//通過顯示意圖打開
Intent intent=new Intent(MainActivity.this,TranSmitData.class);
//【1】通過putExtra方法進行傳遞
intent.putExtra("studentName","小明");
//【2】通過putExtras()進行傳遞
Bundle bundle=new Bundle();
ArrayList<String>Data=new ArrayList<>();
Data.add("小紅");
Data.add("小張");
Data.add("小李");
bundle.putStringArrayList("studentName_2",Data);
intent.putExtras(bundle);
startActivity(intent);
}
/*
回傳資料
*/
public void btn_ReturnData(View view) {
//【3】資料回傳
Intent intent1=new Intent(MainActivity.this,ReturnData.class);
startActivityForResult(intent1,1);
}
//重寫onActivityResult方法
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode,resultCode,data);
if (requestCode==1&&resultCode==2){
String acquiredData=data.getStringExtra("data");
Toast.makeText(MainActivity.this,acquiredData,Toast.LENGTH_SHORT).show();
}
}
}
②:ReturnData.class
package cn.cg.intenttext;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class ReturnData extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_return_data);
}
//回傳資料
public void btn_ReturnData(View view) {
Intent intent=new Intent();
intent.putExtra("data","Hello MainActivity");
setResult(2,intent);
finish();
}
}
③:SecondActivity.class
package cn.cg.intenttext;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import java.util.ArrayList;
public class SecondActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
}
}
④:ThireActivity.class
package cn.cg.intenttext;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
public class ThireActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_thire);
}
}
⑤:TranSmitData.class
package cn.cg.intenttext;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
public class TranSmitData extends AppCompatActivity {
private TextView tranSmitData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tran_smit_data);
//【1】建立意圖,通過getStringExtra()擷取資料
Intent intent=getIntent();
String name=intent.getStringExtra("studentName");
//【2】通過BundlegetString()擷取資料
Bundle bundle=intent.getExtras();
ArrayList<String> name_2=bundle.getStringArrayList("studentName_2");
for (String str :name_2){
name+=str;
}
tranSmitData=findViewById(R.id.text_TransmitData);
tranSmitData.setText(name);
}
}
3:前端布局代碼:
①:activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<Button
android:id="@+id/btn_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="btn_1"
android:text="顯示意圖"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.404" />
<Button
android:id="@+id/btn_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="29dp"
android:onClick="btn_2"
android:text="隐式意圖"
app:layout_constraintStart_toStartOf="@+id/btn_1"
app:layout_constraintTop_toBottomOf="@+id/btn_1" />
<Button
android:onClick="btn_ReturnData"
android:id="@+id/btn_ReturnData"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="26dp"
android:text="回傳資料"
app:layout_constraintStart_toStartOf="@+id/btn_TranSmitData"
app:layout_constraintTop_toBottomOf="@+id/btn_TranSmitData" />
<Button
android:onClick="btn_TranSmitData"
android:id="@+id/btn_TranSmitData"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="33dp"
android:layout_marginEnd="1dp"
android:layout_marginRight="1dp"
android:text="傳遞資料"
app:layout_constraintEnd_toEndOf="@+id/btn_2"
app:layout_constraintTop_toBottomOf="@+id/btn_2" />
</androidx.constraintlayout.widget.ConstraintLayout>
②:activity_return_data.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ReturnData">
<Button
android:id="@+id/btn_ReturnData2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="149dp"
android:layout_marginLeft="149dp"
android:layout_marginTop="298dp"
android:onClick="btn_ReturnData"
android:text="資料回傳"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
③:activity_second.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
tools:context=".SecondActivity">
<TextView
android:id="@+id/textView"
android:layout_width="209dp"
android:layout_height="73dp"
android:layout_marginStart="92dp"
android:layout_marginLeft="92dp"
android:layout_marginBottom="348dp"
android:text="顯示意圖"
android:textColor="#F00"
android:textSize="50sp"
android:textStyle="italic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
④:activity_thire.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ThireActivity">
<TextView
android:id="@+id/textView"
android:layout_width="203dp"
android:layout_height="70dp"
android:layout_marginStart="104dp"
android:layout_marginLeft="104dp"
android:layout_marginBottom="344dp"
android:text="隐式意圖"
android:textColor="#F00"
android:textSize="50sp"
android:textStyle="italic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
⑤:activity_tran_smit_data.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".TranSmitData">
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="87dp"
android:layout_marginLeft="87dp"
android:layout_marginBottom="327dp"
android:text="學生清單資訊:"
android:textSize="30sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/text_TransmitData"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="7dp"
android:layout_marginLeft="7dp"
android:layout_marginTop="32dp"
android:text="null"
android:textSize="30sp"
android:textStyle="bold"
app:layout_constraintStart_toStartOf="@+id/textView2"
app:layout_constraintTop_toBottomOf="@+id/textView2" />
</androidx.constraintlayout.widget.ConstraintLayout>
4:運作效果
點選顯示意圖
點選隐式意圖
點選傳遞資料
點選回傳資料
點選資料回傳